首页 |元器件品牌

PI354X-00 [VICOR]

36VIN to 60VIN Cool-Power ZVS Buck Regulator & LED Driver;
PI354X-00
型号： PI354X-00
厂家： VICOR CORPORATION    VICOR CORPORATION
描述：

36VIN to 60VIN Cool-Power ZVS Buck Regulator & LED Driver
文件： 总40页 (文件大小：1837K)
中文：  中文翻译
下载：  下载PDF数据表文档文件
 查看货源
Cool-Power®  
ZVS Switching Regulators  
PI354x-00  
36VIN to 60VIN Cool-Power ZVS Buck Regulator & LED Driver  
Product Description  
Features & Benefits  
The PI354x-00 is a family of high input voltage, wide input  
range DC-DC ZVS-Buck regulators integrating controller, power  
switches, and support components all within a high density  
System-in-Package (SiP). The PI354x-00 products are designed  
to operate within an SELV compliant system with steady state  
operation limited to 60V. The PI354x-00 products allow for  
transient voltage conditions up to 70V before shutdown is  
triggered. The integration of a high-performance Zero-Voltage  
Switching (ZVS) topology, within the PI354x-00 series, increases  
point of load performance providing best in class power  
efficiency. The PI354x-00 requires only an external inductor,  
two voltage selection resistors and minimal capacitors to form a  
complete DC-DC switching mode buck regulator.  
• High Efficiency HV ZVS-Buck Topology  
• Wide input voltage range of 36V to 60V  
• Tolerant of transient events up to 70VIN  
• Constant voltage or constant current operation  
• Constant current error amplifier and reference  
• Power-up into pre-biased load  
• Parallel capable up to 3 regulators  
• Two phase interleaving  
• Input Over/Undervoltage Lockout (OVLO/UVLO)  
• Output Overvoltage Protection (OVP)  
• Overtemperature Protection (OTP)  
• Fast and slow current limits  
Output Voltage  
Device  
IOUT Max  
Set  
2.5V  
3.3V  
5.0V  
12V  
Range  
2.2V to 3.0V  
2.6V to 3.6V  
4.0V to 5.5V  
6.5V to 14V  
10A  
10A  
10A  
9A  
PI3542-00-xGIZ  
PI3543-00-xGIZ  
PI3545-00-xGIZ  
PI3546-00-xGIZ  
• Differential amplifier for output remote sensing  
• User adjustable soft-start & tracking  
• -40°C to 125°C operating range (TJ)  
Applications  
PI354x-00 Family can operate in constant voltage output for  
typical buck regulation applications in addition to constant current  
• HV to PoL Buck Regulator Applications  
output for LED lighting and battery charging applications.  
• Computing, Communications, Industrial,  
Automotive Accessories  
• Constant current output operation:  
■■LED Lighting  
■■Battery Charging  
Package Information  
• 10 x 10 x 2.6mm LGA SiP  
• 10.5 x 10.5 x 3.05mm BGA SiP  
Cool-Power® ZVS Switching Regulators  
Page 1 of 40  
Rev 1.8  
09/2018  
PI354x-00  
Contents  
Order Information  
3
3
Application Description  
Parallel Operation  
26  
26  
26  
26  
27  
27  
27  
28  
Thermal, Storage and Handling Information  
Absolute Maximum Ratings  
Functional Block Diagram  
3
Synchronization  
4
Interleaving  
Pin Description  
5
Output Voltage Set Point  
Soft-Start Adjust and Tracking  
Inductor Pairing  
Package Pinout  
6
Large Pin Blocks  
6
PI354x-00 Common Electrical Characteristics  
PI3542-00 (2.5VOUT) Electrical Characteristics  
PI3543-00 (3.3VOUT) Electrical Characteristics  
PI3545-00 (5.0VOUT) Electrical Characteristics  
PI3546-00 (12.0VOUT) Electrical Characteristics  
Functional Description  
7
Thermal De-rating  
9
Small Signal Model - Constant Voltage Mode  
Error Amplifier  
28  
28  
29  
30  
32  
33  
33  
34  
36  
37  
38  
39  
40  
13  
17  
21  
25  
25  
25  
25  
25  
25  
25  
26  
26  
26  
26  
26  
Lighting Mode (LGH)  
LGH Amplifier Small Signal Model  
Filter Considerations  
ENABLE (EN)  
VDR Bias Regulator  
Remote Sensing  
System Design Considerations  
Layout Guidelines  
Switching Frequency Synchronization  
Output Voltage Selection  
Recommended PCB Footprint and Stencil  
LGA Package Drawings  
BGA Package Drawings  
Revision History  
Output Current Limit Protection  
Input Undervoltage Lockout  
Input Overvoltage Lockout  
Output Overvoltage Protection  
Overtemperature Protection  
Pulse Skip Mode (PSM)  
Warranty  
Variable Frequency Operation  
Cool-Power® ZVS Switching Regulators  
Page 2 of 40  
Rev 1.8  
09/2018  
PI354x-00  
Order Information  
Output Range  
Transport  
Media  
Cool-Power  
IOUT Max  
Package  
Set  
Range  
PI3542-00-LGIZ  
PI3542-00-BGIZ  
PI3543-00-LGIZ  
PI3543-00-BGIZ  
PI3545-00-LGIZ  
PI3545-00-BGIZ  
PI3546-00-LGIZ  
PI3546-00-BGIZ  
2.5V  
2.5V  
3.3V  
3.3V  
5.0V  
5.0V  
12V  
2.2 – 3.0V  
2.2 – 3.0V  
2.6 – 3.6V  
2.6 – 3.6V  
4.0 – 5.5V  
4.0 – 5.5V  
6.5 – 14V  
6.5 – 14V  
10A  
10A  
10A  
10A  
10A  
10A  
9A  
10 x 10mm LGA  
10.5 x 10.5mm BGA  
10 x 10mm LGA  
TRAY  
TRAY  
TRAY  
TRAY  
TRAY  
TRAY  
TRAY  
TRAY  
10.5 x 10.5mm BGA  
10 x 10mm LGA  
10.5 x 10.5mm BGA  
10 x 10mm LGA  
12V  
9A  
10.5 x 10.5mm BGA  
Thermal, Storage and Handling Information  
Name  
Rating  
Storage Temperature  
Internal Operating Temperature  
Soldering Temperature for 20 seconds  
MSL Rating  
-65°C to 150°C  
-40°C to 125°C  
245°C  
3
Absolute Maximum Ratings  
Name  
VIN  
Rating  
-0.7V to 75V  
-0.7VDC to 75V  
-0.5V to 25V  
100mA  
VS1  
VOUT  
SGND  
TRK  
-0.3V to 5.5V / 30mA  
VDR, SYNCI, SYNCO, PWRGD, EN, LGH, COMP, EAO, EAIN, VDIFF, VSN,  
VSP, TESTx  
-0.3V to 5.5V / 5mA  
Notes: Stresses beyond these limits may cause permanent damage to the device. Operation at these conditions or conditions beyond those listed in the Elec-  
trical Specifications table is not guaranteed. All voltage nodes are referenced to PGND unless otherwise noted.  
Cool-Power® ZVS Switching Regulators  
Page 3 of 40  
Rev 1.8  
09/2018  
PI354x-00  
Functional Block Diagram  
VS1  
VIN  
VOUT  
VSP  
Q2  
Q1  
+
-
VSN  
VDIFF  
LGH  
-
Power  
Control  
VDR  
+
VLGH-REF  
VCC  
EAIN  
ZVS Control  
-
+
VREF  
SYNCO  
SYNCI  
PWRGD  
EN  
EAO  
Digital Parametric Trim  
COMP  
TESTx  
TRK  
PGND  
0Ω  
Simplified Block Diagram  
Cool-Power® ZVS Switching Regulators  
Page 4 of 40  
Rev 1.8  
09/2018  
PI354x-00  
Pin Description  
Name  
Location  
I/O  
Description  
Block 2 (See Pkg  
Pin-Out dwg)  
VS1  
Power  
Switching node: and ZVS sense for power switches.  
Input voltage: and sense for UVLO, OVLO and feed forward ramp.  
VIN  
Block 1  
1E  
Power  
I/O  
Gate Driver VCC : Internally generated 5.1V. May be used as reference or low power bias supply  
for external loads. See Application Description for Important considerations.  
VDR  
Synchronization input: Synchronize to the falling edge of external clock frequency. SYNCI is a  
high impedance digital input node and should always be connected to SGND when not in use.  
SYNCI  
1D  
I
Synchronization output: Outputs a high signal for ½ of the minimum period for synchronization  
of other regulators.  
SYNCO  
TESTx  
1C  
1B, 1A, 2B, 2A  
3A  
O
I/O  
O
Test Connections: Use only with factory guidance. Connect to SGND for proper operation.  
Power Good: High impedance when regulator is operating and VOUT is in regulation.  
Otherwise pulls to SGND.  
PWRGD  
Enable Input: Regulator enable control. When asserted active or left floating: regulator is enabled.  
Otherwise regulator is disabled.  
EN  
4A  
5A  
I
I
Soft-start and track input: An external capacitor may be connected between TRK pin and SGND  
to decrease the rate of rise during soft-start.  
TRK  
Lighting (LGH)/Constant Current (CC) Sense Input: Input with a 100mV threshold. Used for  
lighting and constant current type applications.When not using the constant current mode  
(CC mode), the LGH pin should be connected to SGND.  
LGH  
6A  
8A  
I
Compensation Capacitor: Connect capacitor for control loop dominant pole. See Error Amplifier  
section for details. A default CCOMP of 4.7nF is used in the example  
COMP  
O
EAO  
EAIN  
VDIFF  
VSN  
9A  
10A  
O
Error amp output: External connection for additional compensation and current sharing.  
Error Amp Inverting Input: Connection for the feedback divider tap.  
I
10B  
O
Independent Amplifier Output: Active only when module is enabled.  
Independent Amplifier Inverting Input: If unused, connect in unity gain  
Independent Amplifier Non-Inverting Input: If unused, connect in SGND  
Direct VOUT Connect: for per-cycle internal clamp node and feed-forward ramp.  
10C  
I
VSP  
10D  
I
VOUT  
9E, 10E  
Power  
Signal ground: Internal logic ground for EA, TRK, SYNCI, SYNCO communication returns. SGND  
and PGND are star connected within the regulator package.  
SGND  
PGND  
Block 4  
Block 3  
-
Power  
Power ground: VIN and VOUT power returns.  
Cool-Power® ZVS Switching Regulators  
Page 5 of 40  
Rev 1.8  
09/2018  
PI354x-00  
Package Pinout  
PIN 1 INDEX  
A
B
C
D
E
F
G
H
J
K
VDR  
VS1  
TEST 2  
TEST 1  
SYNCO  
SYNCI  
PGD  
PGD  
PGD  
1
2
TEST 4  
TEST 3  
PGD  
PGD  
PGD  
PGD  
SGD  
SGD  
PGD  
PGD  
PGD  
PGD  
PGD  
PGD  
PGD  
PGD  
PGD  
PGD  
PGD  
PGD  
PGD  
PGD  
PGD  
PGD  
PGD  
PGD  
PGD  
PGD  
PGD  
PGD  
PGD  
PGD  
PGD  
PGD  
VS1  
PWRGD  
VS1  
VS1  
3
EN  
TRK  
SGD  
SGD  
SGD  
SGD  
SGD  
SGD  
VDIFF  
PGD  
PGD  
PGD  
PGD  
4
VS1  
VS1  
5
LGH  
6
VS1  
SGD  
COMP  
EAO  
EAIN  
7
SGD  
SGD  
PGD  
SGD  
PGD  
8
VIN  
VIN  
VIN  
VIN  
VIN  
VIN  
VIN  
VOUT  
9
VSN  
VSP  
VOUT  
VIN  
10  
TOP THROUGH VIEW OF PRODUCT  
PI354X  
Large Pin Blocks  
Pin Block Name  
Group of pins  
K9-10, J9-10, H9-10, G9-10  
K1-7  
VIN  
VS1  
H1-7, G1-7,F1-7, E2-8, D2-8, C2-5  
D9, C6-9, B4-9, A7  
PGND  
SGND  
Cool-Power® ZVS Switching Regulators  
Page 6 of 40  
Rev 1.8  
09/2018  
PI354x-00  
PI354x-00 Common Electrical Characteristics  
Specifications apply for -40°C < TJ < 125°C, VIN = 48V, EN = High, VVDR = 5.1V +/- 2%, L1 = 340nH [1] unless other conditions are noted.  
Parameter  
Symbol  
Conditions  
Min  
Typ  
Max  
Unit  
Differential Amp  
Open Loop Gain  
96  
5
120  
7
140  
12  
1
dB  
MHz  
mV  
V
Small Signal Gain-Bandwidth  
Offset  
-1  
0.5  
Common Mode Input Range  
Differential Mode Input Range  
Input Bias Current  
-0.1  
2.5  
2
V
-1  
1
µA  
V
Maximum VOUT  
IDIFF = -1mA  
VVDR - 0.2  
Minimum VOUT  
20  
50  
mV  
pF  
Capacitive Load Range for Stability  
Slew Rate Rising  
0
11  
11  
V/µs  
V/µs  
mA  
Slew Rate Falling  
Sink/Source Current  
-1  
1
Current Source Function (LGH)  
LGH Reference  
VLGH-REF  
95  
3
100  
0.5  
107  
mV  
mV  
MHz  
pF  
Input Offset  
Gain-Bandwidth Product  
Internal Feedback Capacitance  
Gain  
20  
10  
1
V/V  
V
Intermediate Reference  
Transconductance  
Output Current Capability  
1
mS  
mA  
Sink current only  
1
PWRGD  
[2]  
[2]  
PWRGD Rising Threshold  
PWRGD Falling Threshold  
PWRGD Output Low  
VPG_HI%  
VPG_LO%  
VPG_SAT  
IPG_SAT  
79  
77  
85  
83  
91  
89  
% VOUT_DC  
% VOUT_DC  
V
Sink = 4mA [2]  
0.4  
[2]  
PWRGD Sink Current  
4
mA  
[1] All parameters reflect regulator and inductor system performance. Measurements were made using a standard PI354x evaluation board with 2.5 x 4”  
dimensions and 4 layer, 2 oz copper. Refer to inductor pairing table within Application Description section for specific inductor manufacturer and value.  
[2] Regulator is assured to meet performance specifications by design, test correlation, characterization, and/or statistical process control. Output voltage is  
determined by an external feedback divider ratio.  
[3] Output current capability may be limited and other performance may vary from noted electrical characteristics when VOUT is not set to nominal.  
[4] Refer to Output Ripple plots.  
[5] Refer to Load Current vs. Ambient Temperature curves.  
[6] Refer to Switching Frequency vs. Load current curves.  
Cool-Power® ZVS Switching Regulators  
Page 7 of 40  
Rev 1.8  
09/2018  
PI354x-00  
PI354x-00 Common Electrical Characteristics (Cont.)  
Specifications apply for -40°C < TJ < 125°C, VIN = 48V, EN = High, VVDR = 5.1V +/- 2%, L1 = 340nH [1] unless other conditions are noted.  
Parameter  
Symbol  
Conditions  
Enable  
Min  
Typ  
Max  
Unit  
High Threshold  
VEN_HI  
VEN_LO  
VEN_HYS  
VEN_PU  
IEN_SO  
0.9  
0.7  
100  
1
0.8  
200  
2
1.1  
0.9  
300  
V
V
Low Threshold  
Threshold Hysteresis  
Enable Pull-Up Voltage  
Source Current  
mV  
V
50  
µA  
VDR  
Voltage Setpoint  
External Loading  
VVDR  
IVDR  
VIN_DC > 10V  
4.8  
0
5.1  
5.4  
2
V
See Application Description for details  
mA  
Protection  
Input UVLO Start Threshold  
Input UVLO Stop Hysteresis  
Input UVLO Response Time  
Input OVLO Stop Threshold  
Input OVLO Start Hysteresis  
Input OVLO Response Time  
Output Overvoltage Protection  
VUVLO_START  
VUVLO_HYS  
33.8  
70  
34.8  
0.9  
35.8  
V
V
1.25  
us  
V
VOVLO  
VOVLO_HYS  
tf  
1.3  
1.25  
20  
V
µs  
%
VOVP  
Above set VOUT  
Sync In (SYNCI)  
Synchronization Frequency Range  
SYNCI Threshold  
∆fSYNCI  
Relative to set switching frequency [3]  
50  
110  
%
V
VSYNCI  
VVDR / 2  
Sync Out (SYNCO)  
Source 1mA  
SYNCO High  
VSYNCO_HI  
VSYNCO_LO  
tSYNCO_RT  
tSYNCO_FT  
VVDR –0.5  
V
SYNCO Low  
Sink 1mA  
0.5  
V
ns  
SYNCO Rise Time  
SYNCO Fall Time  
20pF load  
10  
10  
20pF load  
ns  
[1] All parameters reflect regulator and inductor system performance. Measurements were made using a standard PI354x evaluation board with 2.5 x 4”  
dimensions and 4 layer, 2 oz copper. Refer to inductor pairing table within Application Description section for specific inductor manufacturer and value.  
[2] Regulator is assured to meet performance specifications by design, test correlation, characterization, and/or statistical process control. Output voltage is  
determined by an external feedback divider ratio.  
[3] Output current capability may be limited and other performance may vary from noted electrical characteristics when VOUT is not set to nominal.  
[4] Refer to Output Ripple plots.  
[5] Refer to Load Current vs. Ambient Temperature curves.  
[6] Refer to Switching Frequency vs. Load current curves.  
Cool-Power® ZVS Switching Regulators  
Page 8 of 40  
Rev 1.8  
09/2018  
PI354x-00  
PI3542-00 (2.5VOUT) Electrical Characteristics  
Specifications apply for -40°C < TJ < 125°C, VIN = 48V, EN = High, VVDR = 5.1V +/- 2%, L1 = 340nH [1] unless other conditions are noted.  
Parameter  
Symbol  
Conditions  
Min  
Typ  
Max  
Unit  
Input Specifications  
Input Voltage  
VIN_DC  
VIN_TRANS  
IIN_DC  
36  
48  
60  
70  
V
V
A
Input Voltage, Transient  
Input Current  
< 1% duty cycle,entire transient duration < 10ms  
VIN = 48V, TC = 25°C, IOUT = 10A  
0.597  
3.1  
Input Current At Output Short  
(Fault Condition Duty Cycle)  
IIN_Short  
Short at terminals  
mA  
Disabled  
0.75  
1.4  
Input Quiescent Current  
Input Voltage Slew Rate  
IQ_VIN  
VIN_SR  
mA  
Enabled (no load)  
1
V/µs  
Output Specifications  
[2]  
EAIN Voltage Total Regulation  
Output Voltage Trim Range  
Line Regulation  
VEAIN  
0.985  
2.2  
1.00  
2.5  
1.015  
3.0  
V
[2] [3]  
VOUT_DC  
V
∆VOUT /∆VIN @ 25°C, 36V < VIN < 60V  
∆VOUT /∆IOUT @ 25°C, 0.5A < IOUT < 10A  
0.10  
0.10  
47  
%
Load Regulation  
%
Output Voltage Ripple  
Output Current  
VOUT_AC  
IOUT_DC  
NParallel  
IOUT = 10A, COUT = 6 x 100µF, 20MHz BW [4]  
mVp-p  
[5]  
0
10  
3
A
Maximum Array Size  
Output Current, Array of 2  
Output Current, Array of 3  
Current Limit  
Modules  
IOUT_DC-ARRAY2 Total array capability, see applications section for details  
IOUT_DC-ARRAY2 Total array capability, see applications section for details  
0
0
17.7  
25.4  
A
A
A
IOUT_CL  
Typ limit based on nominal 340nH inductor.  
12  
Timing  
Switching Frequency  
Fault Restart Delay  
fS  
[6] 48VIN to 2.5VOUT, 3A out, L1 = 340nH 1%  
-
400  
30  
-
kHz  
ms  
tFR_DLY  
[1] All parameters reflect regulator and inductor system performance. Measurements were made using a standard PI354x evaluation board with 2.5 x 4”  
dimensions and 4 layer, 2 oz copper. Refer to inductor pairing table within Application Description section for specific inductor manufacturer and value.  
[2] Regulator is assured to meet performance specifications by design, test correlation, characterization, and/or statistical process control. Output voltage is  
determined by an external feedback divider ratio.  
[3] Output current capability may be limited and other performance may vary from noted electrical characteristics when VOUT is not set to nominal.  
[4] Refer to Output Ripple plots.  
[5] Refer to Load Current vs. Ambient Temperature curves.  
[6] Refer to Switching Frequency vs. Load current curves.  
Cool-Power® ZVS Switching Regulators  
Page 9 of 40  
Rev 1.8  
09/2018  
PI354x-00  
PI3542-00 (2.5VOUT) Electrical Characteristics (Cont.)  
Specifications apply for -40°C < TJ < 125°C, VIN = 48V, EN = High, VVDR = 5.1V +/- 2%, L1 = 340nH [1] unless other conditions are noted.  
Parameter  
Symbol  
Conditions  
Min  
Typ  
Max  
Unit  
Soft Start, Tracking and Error Amplifier  
TRK Active Range (Nominal)  
TRK Enable Threshold  
VTRK  
VTRK_OV  
VEIAN_OV  
ITRK  
0
1.4  
60  
V
20  
50  
70  
40  
80  
mV  
mV  
µA  
mA  
ms  
mS  
V
TRK to EAIN Offset  
VTRK = 0.5V, EAO shorted to EAIN  
VTRK = 0.5V  
110  
30  
Charge Current (Soft-Start)  
Discharge Current (Fault)  
Soft-Start Time  
50  
ITRK_DIS  
tSS  
10  
CTRK = 0µF  
0.6  
1
0.94  
5.1  
0.8  
1.6  
[2]  
Error Amplifier Trans-Conductance  
PSM Skip Threshold  
GMEAO  
PSMSKIP  
ROUT  
[2]  
[2]  
[2]  
[2]  
Error Amplifier Output Impedance  
Internal Compensation Capacitor  
Internal Compensation Resistor  
MΩ  
pf  
CHF  
56  
5
RZI  
kΩ  
[1] All parameters reflect regulator and inductor system performance. Measurements were made using a standard PI354x evaluation board with 2.5 x 4”  
dimensions and 4 layer, 2 oz copper. Refer to inductor pairing table within Application Description section for specific inductor manufacturer and value.  
[2] Regulator is assured to meet performance specifications by design, test correlation, characterization, and/or statistical process control. Output voltage is  
determined by an external feedback divider ratio.  
[3] Output current capability may be limited and other performance may vary from noted electrical characteristics when VOUT is not set to nominal.  
[4] Refer to Output Ripple plots.  
[5] Refer to Load Current vs. Ambient Temperature curves.  
[6] Refer to Switching Frequency vs. Load current curves.  
Cool-Power® ZVS Switching Regulators  
Page 10 of 40  
Rev 1.8  
09/2018  
PI354x-00  
PI3542-00 (2.5VOUT) Electrical Characteristics (Cont.)  
90  
85  
80  
36VIN  
48VIN  
60VIN  
75  
70  
65  
60  
0
1
2
3
4
5
6
7
8
9
10  
IOUT (A)  
Figure 1 — Regulator Efficiency  
Figure 4 — Output Ripple: 48VIN, 2.5VOUT at 10A.  
VOUT = 20mV/Div, 2.0µs/Div; COUT = 6 x 100µF Ceramic  
450  
425  
400  
375  
350  
325  
300  
275  
250  
36VIN  
48VIN  
60VIN  
0
1
2
3
4
5
6
7
8
9
10  
IOUT (A)  
Figure 2 — Transient Response: 5A to 10A, at 1A/µs. 48VIN to  
Figure 5 — Switching Frequency vs. Load Current  
2.5VOUT, COUT = 6 x 100µF Ceramic  
Figure 3 — Output Short Circuit @ VIN = 48V  
Figure 6 — Output Ripple: 48VIN, 2.5VOUT at 5A. VOUT = 20mV/Div,  
2.0µs/Div; COUT = 6 x 100µF Ceramic  
Cool-Power® ZVS Switching Regulators  
Page 11 of 40  
Rev 1.8  
09/2018  
PI354x-00  
PI3542-00 (2.5VOUT) Electrical Characteristics (Cont.)  
12  
10  
8
12  
10  
8
6
36VIN  
6
4
2
0
48VIN  
60VIN  
4
2
0
0
0.5  
1
1.5  
VEAO (V)  
2
2.5  
3
50  
75  
100  
125  
IOUT @ VIN = 36V  
IOUT @ VIN = 48V  
Ambient Temperature (°C)  
IOUT @ VIN = 60V  
Figure 7 — Load Current vs. Ambient Temperature, 0LFM  
Figure 10 — Output Current vs. Error Voltage VEAO  
8
7
6
5
4
3
2
1
0
12  
10  
8
36VIN  
48VIN  
60VIN  
6
4
2
0
1
2
3
0
VEAO (V)  
50  
75  
100  
125  
gMOD @ VIN = 36V  
gMOD @ VIN = 48V  
Ambient Temperature (°C)  
gMOD @ VIN = 60V  
Figure 8 — Load Current vs. Ambient Temperature, 200LFM  
Figure 11 — Modulator Gain vs. Error Voltage VEAO  
1.5  
1.4  
1.3  
1.2  
1.1  
1
35  
30  
25  
20  
15  
10  
5
12  
10  
8
0.9  
0.8  
0.7  
0.6  
0.5  
0.4  
0.3  
0.2  
0.1  
0
36VIN  
48VIN  
60VIN  
6
4
0
0
1
2
3
2
VEAO Volts DC  
rEQ_OUT_DCM @ VIN = 36V  
rEQ_OUT_DCM @ VIN = 48V  
rEQ_OUT_DCM @ VIN = 60V  
rEQ_OUT_CrCM @ VIN = 36V  
rEQ_OUT_CrCM @ VIN = 48V  
rEQ_OUT_CrCM @ VIN = 60V  
0
50  
75  
100  
125  
Ambient Temperature (°C)  
Figure 9 — Load Current vs. Ambient Temperature, 400LFM  
Figure 12 — Output Equivalent Resistance vs.Error Voltage VEAO  
Cool-Power® ZVS Switching Regulators  
Page 12 of 40  
Rev 1.8  
09/2018  
PI354x-00  
PI3543-00 (3.3VOUT) Electrical Characteristics  
Specifications apply for -40°C < TJ < 125°C, VIN = 48V, EN = High, VVDR = 5.1V +/- 2%, L1 = 420nH [1] unless other conditions are noted.  
Parameter  
Symbol  
Conditions  
Min  
Typ  
Max  
Unit  
Input Specifications  
Input Voltage  
VIN_DC  
VIN_TRANS  
IIN_DC  
36  
48  
60  
70  
V
V
A
Input Voltage, Transient  
Input Current  
< 1% duty cycle,entire transient duration < 10ms  
VIN = 48V, TC = 25°C, IOUT = 10A  
0.762  
3
Input Current At Output Short  
(Fault Condition Duty Cycle)  
IIN_Short  
Short at terminals  
-
mA  
Disabled  
0.75  
1.6  
Input Quiescent Current  
Input Voltage Slew Rate  
IQ_VIN  
VIN_SR  
mA  
Enabled (no load)  
1
V/µs  
Output Specifications  
[2]  
EAIN Voltage Total Regulation  
Output Voltage Trim Range  
Line Regulation  
VEAIN  
0.985  
2.6  
1.00  
3.3  
1.015  
3.6  
V
[2] [3]  
VOUT_DC  
V
∆VOUT /∆VIN @ 25°C, 36V < VIN < 60V  
∆VOUT /∆IOUT @ 25°C, 0.5A < IOUT < 10A  
0.10  
0.10  
62  
%
Load Regulation  
%
Output Voltage Ripple  
Output Current  
VOUT_AC  
IOUT_DC  
NParallel  
IOUT = 10A, COUT = 6 x 100µF, 20MHz BW [4]  
mVp-p  
[5]  
0
10  
3
A
Maximum Array Size  
Output Current, Array of 2  
Output Current, Array of 3  
Current Limit  
Modules  
IOUT_DC-ARRAY2 Total array capability, see applications section for details  
IOUT_DC-ARRAY2 Total array capability, see applications section for details  
0
0
17.7  
25.4  
A
A
A
IOUT_CL  
Typ limit based on nominal 420nH inductor  
11.5  
Timing  
Switching Frequency  
Fault Restart Delay  
fS  
[6] 48VIN to 3.3VOUT, 6A out, L1 = 420nH 1%  
-
400  
30  
-
kHz  
ms  
tFR_DLY  
[1] All parameters reflect regulator and inductor system performance. Measurements were made using a standard PI354x evaluation board with 2.5 x 4”  
dimensions and 4 layer, 2 oz copper. Refer to inductor pairing table within Application Description section for specific inductor manufacturer and value.  
[2] Regulator is assured to meet performance specifications by design, test correlation, characterization, and/or statistical process control. Output voltage is  
determined by an external feedback divider ratio.  
[3] Output current capability may be limited and other performance may vary from noted electrical characteristics when VOUT is not set to nominal.  
[4] Refer to Output Ripple plots.  
[5] Refer to Load Current vs. Ambient Temperature curves.  
[6] Refer to Switching Frequency vs. Load current curves.  
Cool-Power® ZVS Switching Regulators  
Page 13 of 40  
Rev 1.8  
09/2018  
PI354x-00  
PI3543-00 (3.3VOUT) Electrical Characteristics (Cont.)  
Specifications apply for -40°C < TJ < 125°C, VIN = 48V, EN = High, VVDR = 5.1V +/- 2%, L1 = 420nH [1] unless other conditions are noted.  
Parameter  
Symbol  
Conditions  
Min  
Typ  
Max  
Unit  
Soft Start, Tracking and Error Amplifier  
TRK Active Range (Nominal)  
TRK Enable Threshold  
VTRK  
VTRK_OV  
VEIAN_OV  
ITRK  
0
1.4  
60  
V
20  
50  
70  
40  
80  
mV  
mV  
µA  
mA  
ms  
mS  
V
TRK to EAIN Offset  
VTRK = 0.5V, EAO shorted to EAIN  
VTRK = 0.5V  
110  
30  
Charge Current (Soft-Start)  
Discharge Current (Fault)  
Soft-Start Time  
50  
ITRK_DIS  
tSS  
10  
CTRK = 0µF  
0.6  
1
0.94  
5.1  
0.8  
1.6  
[2]  
Error Amplifier Trans-Conductance  
PSM Skip Threshold  
GMEAO  
PSMSKIP  
ROUT  
[2]  
[2]  
[2]  
[2]  
Error Amplifier Output Impedance  
Internal Compensation Capacitor  
Internal Compensation Resistor  
MΩ  
pf  
CHF  
56  
6
RZI  
kΩ  
[1] All parameters reflect regulator and inductor system performance. Measurements were made using a standard PI354x evaluation board with 2.5 x 4”  
dimensions and 4 layer, 2 oz copper. Refer to inductor pairing table within Application Description section for specific inductor manufacturer and value.  
[2] Regulator is assured to meet performance specifications by design, test correlation, characterization, and/or statistical process control. Output voltage is  
determined by an external feedback divider ratio.  
[3] Output current capability may be limited and other performance may vary from noted electrical characteristics when VOUT is not set to nominal.  
[4] Refer to Output Ripple plots.  
[5] Refer to Load Current vs. Ambient Temperature curves.  
[6] Refer to Switching Frequency vs. Load current curves.  
Cool-Power® ZVS Switching Regulators  
Page 14 of 40  
Rev 1.8  
09/2018  
PI354x-00  
PI3543-00 (3.3VOUT) Electrical Characteristics (Cont.)  
95  
90  
85  
36VIN  
48VIN  
60VIN  
80  
75  
70  
0
1
2
3
4
5
6
7
8
9
10  
IOUT (A)  
Figure 13 — Regulator Efficiency  
Figure 16 — Output Ripple: 48VIN, 3.3VOUT at 10A.  
VOUT = 20mV/Div, 2.0µs/Div;  
COUT = 6 x 100µF Ceramic  
400  
350  
300  
250  
36VIN  
48VIN  
60VIN  
0
1
2
3
4
5
6
7
8
9
10  
IOUT (A)  
Figure 14 — Transient Response: 5A to 10A, at 1A/µs. 48VIN to  
Figure 17 — Switching Frequency vs. Load Current  
3.3VOUT, COUT = 6 x 100µF Ceramic  
Figure 15 — Output Short Circuit @ VIN = 48V  
Figure 18 — Output Ripple: 48VIN, 3.3VOUT at 5A.  
VOUT = 20mV/Div, 2.0µs/Div;  
COUT = 6 x 100µF Ceramic  
Cool-Power® ZVS Switching Regulators  
Page 15 of 40  
Rev 1.8  
09/2018  
PI354x-00  
PI3543-00 (3.3VOUT) Electrical Characteristics (Cont.)  
12  
10  
8
12  
10  
8
6
36VIN  
6
4
2
0
48VIN  
60VIN  
4
2
0
0
1
2
3
4
VEAO (V)  
50  
75  
100  
125  
IOUT @ VIN = 36V  
IOUT @ VIN = 48V  
Ambient Temperature (°C)  
IOUT @ VIN = 60V  
Figure 19 — Load Current vs. Ambient Temperature, 0LFM  
Figure 22 — Output Current vs. Error Voltage VEAO  
12  
10  
8
8
7
6
5
4
3
2
1
0
36VIN  
48VIN  
60VIN  
6
4
2
0
0
1
2
3
4
50  
75  
100  
125  
VEAO (V)  
Ambient Temperature (°C)  
gMOD @ VIN = 36V  
gMOD @ VIN = 48V  
gMOD @ VIN = 60V  
Figure 20 — Load Current vs. Ambient Temperature, 200LFM  
Figure 23 — Modulator Gain vs. Error Voltage VEAO  
120  
3.5  
3
12  
10  
8
100  
80  
60  
40  
20  
0
2.5  
2
1.5  
1
36VIN  
48VIN  
60VIN  
6
4
2
0
0.5  
0
0
1
2
3
4
VEAO Volts DC  
rEQ_OUT_DCM @ VIN = 36V  
rEQ_OUT_DCM @ VIN = 48V  
rEQ_OUT_DCM @ VIN = 60V  
rEQ_OUT_CrCM @ VIN = 36V  
rEQ_OUT_CrCM @ VIN = 48V  
rEQ_OUT_CrCM @ VIN = 60V  
50  
75  
100  
125  
Ambient Temperature (°C)  
Figure 21 — Load Current vs. Ambient Temperature, 400LFM  
Figure 24 — Output Equivalent Resistance vs. Error Voltage VEAO  
Cool-Power® ZVS Switching Regulators  
Page 16 of 40  
Rev 1.8  
09/2018  
PI354x-00  
PI3545-00 (5.0VOUT) Electrical Characteristics  
Specifications apply for -40°C < TJ < 125°C, VIN = 48V, EN = High, VVDR = 5.1V +/- 2%, L1 = 420nH [1] unless other conditions are noted.  
Parameter  
Symbol  
Conditions  
Min  
Typ  
Max  
Unit  
Input Specifications  
Input Voltage  
VIN_DC  
VIN_TRANS  
IIN_DC  
36  
48  
60  
70  
V
V
A
Input Voltage, Transient  
Input Current  
< 1% duty cycle,entire transient duration < 10ms  
VIN = 48V, TC = 25°C, IOUT = 10A  
1.126  
3.2  
Input Current At Output Short  
(Fault Condition Duty Cycle)  
IIN_Short  
Short at terminals  
-
mA  
Disabled  
0.75  
1.8  
Input Quiescent Current  
Input Voltage Slew Rate  
IQ_VIN  
VIN_SR  
mA  
Enabled (no load)  
1
V/µs  
Output Specifications  
[2]  
EAIN Voltage Total Regulation  
Output Voltage Trim Range  
Line Regulation  
VEAIN  
0.985  
4.0  
1.00  
5.0  
1.015  
5.5  
V
[2] [3]  
VOUT_DC  
V
∆VOUT /∆VIN @ 25°C, 36V < VIN < 60V  
∆VOUT /∆IOUT @ 25°C, 0.5A < IOUT < 10A  
0.10  
0.10  
62.4  
%
Load Regulation  
%
Output Voltage Ripple  
Output Current  
VOUT_AC  
IOUT_DC  
NParallel  
IOUT = 10A, COUT = 6 x 47µF, 20MHz BW [4]  
mVp-p  
[5]  
0
10  
3
A
Maximum Array Size  
Output Current, Array of 2  
Output Current, Array of 3  
Current Limit  
Modules  
IOUT_DC-ARRAY2 Total array capability, see applications section for details  
IOUT_DC-ARRAY2 Total array capability, see applications section for details  
0
0
17.7  
25.4  
A
A
A
IOUT_CL  
Typ limit based on nominal 420nH inductor.  
12  
Timing  
Switching Frequency  
Fault Restart Delay  
fS  
[6] 48VIN to 5VOUT, 3A out, L1 = 420nH 1%  
-
600  
30  
-
kHz  
ms  
tFR_DLY  
[1] All parameters reflect regulator and inductor system performance. Measurements were made using a standard PI354x evaluation board with 2.5 x 4”  
dimensions and 4 layer, 2 oz copper. Refer to inductor pairing table within Application Description section for specific inductor manufacturer and value.  
[2] Regulator is assured to meet performance specifications by design, test correlation, characterization, and/or statistical process control. Output voltage is  
determined by an external feedback divider ratio.  
[3] Output current capability may be limited and other performance may vary from noted electrical characteristics when VOUT is not set to nominal.  
[4] Refer to Output Ripple plots.  
[5] Refer to Load Current vs. Ambient Temperature curves.  
[6] Refer to Switching Frequency vs. Load current curves.  
Cool-Power® ZVS Switching Regulators  
Page 17 of 40  
Rev 1.8  
09/2018  
PI354x-00  
PI3545-00 (5.0VOUT) Electrical Characteristics (Cont.)  
Specifications apply for -40°C < TJ < 125°C, VIN = 48V, EN = High, VVDR = 5.1V +/- 2%, L1 = 420nH [1] unless other conditions are noted.  
Parameter  
Symbol  
Conditions  
Min  
Typ  
Max  
Unit  
Soft Start, Tracking and Error Amplifier  
TRK Active Range (Nominal)  
TRK Enable Threshold  
VTRK  
VTRK_OV  
VEIAN_OV  
ITRK  
0
1.4  
60  
V
20  
50  
70  
40  
80  
mV  
mV  
µA  
mA  
ms  
mS  
V
TRK to EAIN Offset  
VTRK = 0.5V, EA0 shorted to EAIN  
VTRK = 0.5V  
110  
30  
Charge Current (Soft-Start)  
Discharge Current (Fault)  
Soft-Start Time  
50  
ITRK_DIS  
tSS  
10  
CTRK = 0µF  
0.6  
1
0.94  
5.1  
0.8  
1.6  
[2]  
Error Amplifier Trans-Conductance  
PSM Skip Threshold  
GMEAO  
PSMSKIP  
ROUT  
[2]  
[2]  
[2]  
[2]  
Error Amplifier Output Impedance  
Internal Compensation Capacitor  
Internal Compensation Resistor  
MΩ  
pf  
CHF  
56  
6
RZI  
kΩ  
[1] All parameters reflect regulator and inductor system performance. Measurements were made using a standard PI354x evaluation board with 2.5 x 4”  
dimensions and 4 layer, 2 oz copper. Refer to inductor pairing table within Application Description section for specific inductor manufacturer and value.  
[2] Regulator is assured to meet performance specifications by design, test correlation, characterization, and/or statistical process control. Output voltage is  
determined by an external feedback divider ratio.  
[3] Output current capability may be limited and other performance may vary from noted electrical characteristics when VOUT is not set to nominal.  
[4] Refer to Output Ripple plots.  
[5] Refer to Load Current vs. Ambient Temperature curves.  
[6] Refer to Switching Frequency vs. Load current curves.  
Cool-Power® ZVS Switching Regulators  
Page 18 of 40  
Rev 1.8  
09/2018  
PI354x-00  
PI3545-00 (5.0VOUT) Electrical Characteristics (Cont.)  
95  
90  
85  
36VIN  
48VIN  
60VIN  
80  
75  
70  
0
1
2
3
4
5
6
7
8
9
10  
IOUT (A)  
Figure 25 — Regulator Efficiency at 25°C  
Figure 28 — Output Ripple: 48VIN, 5.0VOUT at 10A.  
VOUT = 20mV/Div, 2.0µs/Div;  
COUT = 6 x 47µF Ceramic  
600  
550  
500  
450  
400  
36VIN  
48VIN  
60VIN  
0
1
2
3
4
5
6
7
8
9
10  
IOUT (A)  
Figure 26 — Transient Response: 5A to 10A, at 1A/µs. 48VIN to  
Figure 29 — Switching Frequency vs. Load Current  
5.0VOUT COUT = 6 x 47µF Ceramic  
Figure 27 — Output Short Circuit @ VIN = 48V  
Figure 30 — Output Ripple: 48VIN, 5.0VOUT at 5A.  
VOUT = 20mV/Div, 2.0µs/Div;  
COUT = 6 x 47µF Ceramic  
Cool-Power® ZVS Switching Regulators  
Page 19 of 40  
Rev 1.8  
09/2018  
PI354x-00  
PI3545-00 (5.0VOUT) Electrical Characteristics (Cont.)  
12  
10  
8
12  
10  
8
6
36VIN  
6
4
2
0
48VIN  
60VIN  
4
2
0
0
0.5  
1
1.5  
2
2.5  
3
V(EAO) Volts  
50  
75  
100  
125  
IOUT @ VIN = 36V  
IOUT @ VIN = 48V  
Ambient Temperature (°C)  
IOUT @ VIN = 60V  
Figure 31 — Load Current vs. Ambient Temperature, 0LFM  
Figure 34 — Output Current vs. Error Voltage VEAO  
8
7
6
5
4
3
2
1
0
12  
10  
8
36VIN  
48VIN  
60VIN  
6
4
2
0
0
1
2
3
VEAO Volts  
50  
75  
100  
125  
Ambient Temperature (°C)  
gMOD @ VIN = 36V  
gMOD @ VIN = 48V  
gMOD @ VIN = 60V  
Figure 32 — Load Current vs. Ambient Temperature, 200LFM  
Figure 35 — Modulator Gain vs. Error Voltage VEAO  
45  
40  
35  
30  
25  
20  
15  
10  
5
4.5  
4
12  
10  
8
3.5  
3
2.5  
2
36VIN  
48VIN  
60VIN  
6
4
2
0
1.5  
1
0.5  
0
0
0
1
2
3
VEAO Volts DC  
rEQ_OUT_DCM @ VIN = 36V  
rEQ_OUT_DCM @ VIN = 48V  
rEQ_OUT_DCM @ VIN = 60V  
rEQ_OUT_CrCM @ VIN = 36V  
rEQ_OUT_CrCM @ VIN = 48V  
rEQ_OUT_CrCM @ VIN = 60V  
50  
75  
100  
125  
Ambient Temperature (°C)  
Figure 33 — Load Current vs. Ambient Temperature, 400LFM  
Figure 36 — Output Equivalent Resistance vs. Error Voltage VEAO  
Cool-Power® ZVS Switching Regulators  
Page 20 of 40  
Rev 1.8  
09/2018  
PI354x-00  
PI3546-00 (12.0VOUT) Electrical Characteristics  
Specifications apply for -40°C < TJ < 125°C, VIN = 48V, EN = High, VVDR = 5.1V +/- 2%, L1 = 900nH [1] unless other conditions are noted.  
Parameter  
Symbol  
Conditions  
Min  
Typ  
Max  
Unit  
Input Specifications  
Input Voltage  
VIN_DC  
VIN_TRANS  
IIN_DC  
36  
48  
60  
70  
V
V
A
Input Voltage, Transient  
Input Current  
< 1% duty cycle,entire transient duration < 10ms  
VIN = 48V, TC = 25°C, IOUT = 9A  
2.33  
3.3  
Input Current At Output Short  
(Fault Condition Duty Cycle)  
IIN_Short  
Short at terminals  
-
mA  
Disabled  
0.75  
2.6  
Input Quiescent Current  
Input Voltage Slew Rate  
IQ_VIN  
VIN_SR  
mA  
Enabled (no load)  
1
V/µs  
Output Specifications  
[2]  
EAIN Voltage Total Regulation  
Output Voltage Trim Range  
Line Regulation  
VEAIN  
0.985  
6.5  
1.00  
12  
1.015  
14  
V
[2] [3]  
VOUT_DC  
V
∆VOUT /∆VIN @ 25°C, 36V < VIN < 60V  
∆VOUT /∆IOUT @ 25°C, 0.5A < IOUT < 9A  
0.10  
0.10  
114  
%
Load Regulation  
%
Output Voltage Ripple  
Output Current  
VOUT_AC  
IOUT_DC  
NParallel  
IOUT = 9A, COUT = 6 x 10µF, 20MHz BW [4]  
mVp-p  
[5]  
0
9
A
Maximum Array Size  
Output Current, Array of 2  
Output Current, Array of 3  
Current Limit  
3
Modules  
IOUT_DC-ARRAY2 Total array capability, see applications section for details  
IOUT_DC-ARRAY2 Total array capability, see applications section for details  
0
0
15.9  
22.9  
A
A
A
IOUT_CL  
Typ limit based on nominal 900nH inductor.  
10.5  
Timing  
Switching Frequency  
Fault Restart Delay  
fS  
[6] 48VIN to 12VOUT, 2A out, L1 = 900nH 1%  
-
800  
30  
-
kHz  
ms  
tFR_DLY  
[1] All parameters reflect regulator and inductor system performance. Measurements were made using a standard PI354x evaluation board with 2.5 x 4”  
dimensions and 4 layer, 2 oz copper. Refer to inductor pairing table within Application Description section for specific inductor manufacturer and value.  
[2] Regulator is assured to meet performance specifications by design, test correlation, characterization, and/or statistical process control. Output voltage is  
determined by an external feedback divider ratio.  
[3] Output current capability may be limited and other performance may vary from noted electrical characteristics when VOUT is not set to nominal.  
[4] Refer to Output Ripple plots.  
[5] Refer to Load Current vs. Ambient Temperature curves.  
[6] Refer to Switching Frequency vs. Load current curves.  
Cool-Power® ZVS Switching Regulators  
Page 21 of 40  
Rev 1.8  
09/2018  
PI354x-00  
PI3546-00 (12.0VOUT) Electrical Characteristics (Cont.)  
Specifications apply for -40°C < TJ < 125°C, VIN = 48V, EN = High, VVDR = 5.1V +/- 2%, L1 = 900nH [1] unless other conditions are noted.  
Parameter  
Symbol  
Conditions  
Min  
Typ  
Max  
Unit  
Soft Start, Tracking and Error Amplifier  
TRK Active Range (Nominal)  
TRK Enable Threshold  
VTRK  
VTRK_OV  
VEIAN_OV  
ITRK  
0
1.4  
60  
V
20  
50  
70  
40  
80  
mV  
mV  
µA  
mA  
ms  
mS  
V
TRK to EAIN Offset  
VTRK = 0.5V, EA0 shorted to EAIN  
VTRK = 0.5V  
110  
30  
Charge Current (Soft-Start)  
Discharge Current (Fault)  
Soft-Start Time  
50  
ITRK_DIS  
tSS  
10  
CTRK = 0µF  
0.6  
1
0.94  
7.6  
0.8  
1.6  
[2]  
Error Amplifier Trans-Conductance  
PSM Skip Threshold  
GMEAO  
PSMSKIP  
ROUT  
[2]  
[2]  
[2]  
[2]  
Error Amplifier Output Impedance  
Internal Compensation Capacitor  
Internal Compensation Resistor  
MΩ  
pf  
CHF  
56  
5
RZI  
kΩ  
[1] All parameters reflect regulator and inductor system performance. Measurements were made using a standard PI354x evaluation board with 2.5 x 4”  
dimensions and 4 layer, 2 oz copper. Refer to inductor pairing table within Application Description section for specific inductor manufacturer and value.  
[2] Regulator is assured to meet performance specifications by design, test correlation, characterization, and/or statistical process control. Output voltage is  
determined by an external feedback divider ratio.  
[3] Output current capability may be limited and other performance may vary from noted electrical characteristics when VOUT is not set to nominal.  
[4] Refer to Output Ripple plots.  
[5] Refer to Load Current vs. Ambient Temperature curves.  
[6] Refer to Switching Frequency vs. Load current curves.  
Cool-Power® ZVS Switching Regulators  
Page 22 of 40  
Rev 1.8  
09/2018  
PI354x-00  
PI3546-00 (12.0VOUT) Electrical Characteristics (Cont.)  
100  
95  
36VIN  
48VIN  
60VIN  
90  
85  
0
1
2
3
4
5
6
7
8
9
IOUT (A)  
Figure 37 — Regulator Efficiency  
Figure 40 — Output Ripple: 48VIN, 12.0VOUT at 9A.  
VOUT = 50mV/Div, 2.0µs/Div;  
COUT = 6 x 10µF Ceramic  
850  
800  
750  
700  
650  
600  
550  
500  
450  
400  
350  
36VIN  
48VIN  
60VIN  
0
1
2
3
4
5
6
7
8
9
10  
IOUT (A)  
Figure 38 — Transient Response: 5A to 10A, at 1A/µs. 48VIN to  
Figure 41 — Switching Frequency vs. Load Current  
12.0VOUT, COUT = 6 x 10µF Ceramic  
Figure 39 — Output Short Circuit @ VIN = 48V  
Figure 42 — Output Ripple: 48VIN, 12.0VOUT at 4.5A.  
VOUT = 10mV/Div, 2.0µs/Div;  
COUT = 6 x 10µF Ceramic  
Cool-Power® ZVS Switching Regulators  
Page 23 of 40  
Rev 1.8  
09/2018  
PI354x-00  
PI3546-00 (12.0VOUT) Electrical Characteristics (Cont.)  
12  
10  
8
10  
9
8
7
6
6
36VIN  
5
4
3
2
1
0
48VIN  
60VIN  
4
2
0
0
1
2
3
4
V(EAO) Volts  
50  
75  
100  
125  
IOUT @ VIN = 36V  
IOUT @ VIN = 48V  
Ambient Temperature (°C)  
IOUT @ VIN = 60V  
Figure 43 — Load Current vs. Ambient Temperature, 0LFM  
Figure 46 — Output Current vs. Error Voltage VEAO  
10  
9
8
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
36VIN  
48VIN  
60VIN  
0
1
2
3
4
50  
75  
100  
125  
VEAO Volts  
Ambient Temperature (°C)  
gMOD @ VIN = 36V  
gMOD @ VIN = 48V  
gMOD @ VIN = 60V  
Figure 44 — Load Current vs. Ambient Temperature, 200LFM  
Figure 47 — Modulator Gain vs. Error Voltage VEAO  
10  
9
8
7
6
5
4
3
2
1
0
35  
30  
25  
20  
15  
10  
5
10  
9
8
7
6
36VIN  
48VIN  
60VIN  
5
4
3
2
1
0
0
0
1
2
3
4
VEAO Volts DC  
rEQ_OUT_DCM @ VIN = 36V  
rEQ_OUT_DCM @ VIN = 48V  
rEQ_OUT_DCM @ VIN = 60V  
rEQ_OUT_CrCM @ VIN = 36V  
rEQ_OUT_CrCM @ VIN = 48V  
rEQ_OUT_CrCM @ VIN = 60V  
50  
75  
100  
125  
Ambient Temperature (°C)  
Figure 45 — Load Current vs. Ambient Temperature, 400LFM  
Figure 48 — Output Equivalent Resistance vs. Error Voltage VEAO  
Cool-Power® ZVS Switching Regulators  
Page 24 of 40  
Rev 1.8  
09/2018  
PI354x-00  
no longer 180 degrees. Also when the switching frequency of a  
module is reduced due to an external clock source driving SYNCI,  
the current limit threshold may be significantly reduced.  
Functional Description  
The PI354x-00 is a family of highly integrated ZVS-Buck  
regulators. The PI354x-00 has an output voltage that can be set  
within a prescribed range shown in Table 1. Performance and  
maximum output current are characterized with a specific external  
power inductor (see Table 2).  
Soft-Start  
The PI354x-00 includes an internal soft-start capacitor to  
control the rate of rise of the output voltage. See the Electrical  
Characteristics Section for the default value. Connecting an  
external capacitor from the TRK pin to SGND will increase the  
start-up ramp period. See, “Soft Start Adjustment and Track,” in  
the Applications Description section for more details.  
L1  
VIN  
PGND  
VDR  
VIN  
VS1  
VOUT  
VSN  
VOUT  
COUT  
CIN  
PI354X  
Output Voltage Selection  
VSP  
VDIFF  
LGH  
EAIN  
EAO  
COMP  
TRK  
The PI354x-00 output voltage can be selected by connecting a  
resistor from EAIN pin to SGND and a resistor from Vout to the  
EAIN pin as shown in Figure 49. Table 1 defines the allowable  
operational voltage ranges for the PI354x-00 family.  
SYNCO  
SYNCI  
PWRGD  
EN  
TESTx  
SGND  
Output Voltage  
Device  
Nom.  
2.5V  
3.3V  
5.0V  
12V  
Range  
Figure 49 — ZVS-Buck with required components  
PI3542-00-xGIZ  
PI3543-00-xGIZ  
PI3545-00-xGIZ  
PI3546-00-xGIZ  
2.2V to 3.0V  
2.6V to 3.6V  
4.0V to 5.5V  
6.5V to 14.0V  
For basic operation, Figure 49 shows the connections  
and components required. No additional design or  
settings are required.  
ENABLE (EN)  
Table 1 — PI354x-00 family output voltage ranges  
EN is the enable pin of the converter. The EN Pin is referenced  
to SGND and permits the user to turn the regulator on or off.  
The EN default polarity is a positive logic assertion. If the EN pin  
is left floating or asserted high, the converter output is enabled.  
Pulling EN pin below 0.8VDC with respect to SGND will disable the  
regulator output.  
Output Current Limit Protection  
PI354x-00 has two methods implemented to protect from output  
short or over current condition.  
Slow Current Limit protection: prevents the output from  
sourcing current higher than the regulator’s maximum rated  
Remote Sensing  
current. If the output current exceeds the Current Limit (IOUT_CL  
for 1024µs, a slow current limit fault is initiated and the  
regulator is shutdown which eliminates output current flow.  
After Fault Restart Delay (tFR_DLY), a soft-start cycle is initiated.  
This restart cycle will be repeated indefinitely until the excessive  
load is removed.  
)
If remote sensing is required, the PI354x-00 product family  
is equipped with an undedicated differential amplifier. This  
amplifier can allow full differential remote sense by configuring  
it as a differential follower and connecting the VDIFF pin  
to the EAIN pin.  
Fast Current Limit protection: PI354x-00 monitors the  
regulator inductor current pulse-by-pulse to prevent the output  
from supplying very high current due to sudden low impedance  
short. If the regulator senses a high inductor current pulse, it will  
initiate a fault and stop switching until Fault Restart Delay ends  
and then initiate a soft-start cycle.  
Switching Frequency Synchronization  
The SYNCO pin provides a 5V level clock that can be used to  
monitor the internal clock of the regulator, or synchronize other  
regulators to it. The start of the switching cycles will coincide with  
the rising edge of SYNCO, and SYNCO will remain high for ½ the  
period of the preset switching frequency (fS), or T1, whichever  
is longer. The SYNCI input allows the controller to synchronize  
its internal clock to an external clock source. The SYNCI pin  
should be connected to SGND through a 0Ω resistor when  
not in use and should never be left floating. The controller can  
synchronize to frequencies between 50% and 110% of the preset  
switching frequency (fS). When using SYNCI, the PI354x-00 phase  
synchronizes to the falling edge of the applied clock on SYNCI.  
When SYNCI is driven from a second module’s SYNCO, there is  
an effective 180 degrees of phase shift between the start of the  
switching cycles, provided the modules are switching at the preset  
switching frequency. At higher loads when pulse stretching occurs  
and the operating frequency is lowered, the phase shift is  
Input Undervoltage Lockout  
If VIN falls below the input Undervoltage Lockout (UVLO)  
threshold, but remains high enough to power the internal bias  
supply, the PI354x-00 will complete the current cycle and stop  
switching. The system will soft start once the input voltage is  
reestablished and after the Fault Restart Delay.  
Cool-Power® ZVS Switching Regulators  
Page 25 of 40  
Rev 1.8  
09/2018  
PI354x-00  
Input Overvoltage Lockout  
Variable Frequency Operation  
If VIN exceeds the input Overvoltage Lockout (OVLO) threshold  
(VOVLO), while the controller is running, the PI354x-00 will  
complete the current cycle and stop switching. The system will  
soft start after the Fault Restart Delay once VIN recovers. The  
PI354x products permit input voltage positive transient excursions  
beyond VIN_DC maximum, up to VIN-TRANS maximum. In this case,  
the input voltage is allowed to be outside the VIN_DC range for  
up to 10ms, with no more than a 1% duty cycle. Note that any  
excursion beyond the VIN_DC maximum must still adhere to the  
Each PI354x-00 is preprogrammed to a base operating frequency,  
with respect to the power stage inductor (see Table 2), to operate  
at peak efficiency across line and load variations. At low line  
and high load applications, the base frequency will decrease to  
accommodate these extreme operating ranges. By stretching the  
frequency, the ZVS operation is preserved throughout the total  
input line voltage range therefore maintaining  
optimum efficiency.  
maximum slew rate VIN_SR  
.
Application Description  
Output Overvoltage Protection  
Parallel Operation  
The PI354x-00 family is equipped with output Overvoltage  
Protection (OVP) to prevent damage to input voltage  
sensitive devices. If the output voltage exceeds 20% of its set  
regulated value, the regulator will complete the current cycle  
and stop switching. The system will resume operation once  
the output voltage falls below the OVP threshold and after  
Fault Restart Delay.  
PI354x-00 can be connected in parallel to increase the output  
capability of a single output rail. When connecting modules in  
parallel, each EAO, TRK, EAIN and EN pin should be connected  
together. Current sharing will occur automatically in this manner  
so long as each inductor is the same value. A common viewing  
chain may be used to sense the output voltage. Refer to the  
Electrical Characteristics table for maximum array size and  
array rated output current. Current sharing may be considered  
independent of synchronization and/or interleaving. Modules do  
not have to be interleaved or synchronized to share current.  
Overtemperature Protection  
The PI354x features an over temperature protection (OTP), which  
will not engage until after the product is operated above the  
maximum rated temperature. The OTP circuit is only designed to  
protect against catastrophic failure due to excessive temperatures  
and should not be relied upon to ensure the device stays within  
the recommended operating temperature range. Thermal  
shutdown terminates switching and discharges the soft-start  
capacitor. As the temperature falls the PI354x will restart,  
and this will always occur before the product returns to rated  
temperature range.  
Synchronization  
PI354x-00 units may be synchronized to an external clock by  
driving the SYNCI pin. The synchronization frequency must not  
be higher than the programmed maximum value FSW. This is the  
switching frequency during DCM of operation. The minimum  
synchronization frequency is FSW /2. In order to ensure proper  
power delivery during synchronization, the user should refer  
to the switching frequency vs. output current curves for the  
load current, output voltage and input voltage operating point.  
The synchronization frequency should not be lower than that  
determined by the curve or reduced output power will result.  
The power reduction is approximately the ratio between required  
frequency and synchronizing frequency. If the required frequency  
is 1MHz and the sync frequency is 600kHz, the user should  
expect a 40% reduction in output capability.  
Pulse Skip Mode (PSM)  
PI354x-00 features a PSM to achieve high efficiency at light loads.  
The regulators are setup to skip pulses if EAO falls below a PSM  
threshold. Depending on conditions and component values, this  
may result in single pulses or several consecutive pulses followed  
by skipped pulses. Skipping cycles significantly reduces gate drive  
power and improves light load efficiency. The regulator will leave  
PSM once the EAO rises above the Skip Mode threshold.  
Interleaving  
Interleaving is primarily done to reduce output ripple and the  
required number of output capacitors by introducing phase  
current cancellation. The PI354x-00 has a fixed delay that is  
proportional to to the maximum value of FSW shown in the data  
sheet. When connecting two units as shown in Figure 50, they  
will operate at 180 degrees out of phase when the converters  
switching frequency is equal to FSW. If the converter enters CrCM  
and the switching frequency is lower than FSW, the phase delay  
will no longer be 180 degrees and ripple cancellation will begin  
to decay. Interleaving when the switching frequency is reduced  
to lower than 80% of the programmed maximum value is  
not recommended.  
L1  
VIN  
VIN  
PGND  
VDR  
VS1  
VOUT  
VSN  
VSP  
VDIFF  
LGH  
EAIN  
EAO  
COMP  
TRK  
VOUT  
CIN  
PI354X  
COUT  
SYNCI #2  
R1  
SYNCO  
SYNCI  
PWRGD  
EN  
TESTx  
SGND  
(#1)  
SYNCO #2  
EN #2  
EAO #2  
TRK #2  
L1  
VIN  
VIN  
PGND  
VDR  
VS1  
VOUT  
VSN  
VSP  
VDIFF  
LGH  
CIN  
PI354X  
COUT  
To R1  
SYNCO  
SYNCI  
PWRGD  
EN  
(#2)  
SYNCO #1  
EN #1  
EAIN  
EAO  
EAO #1  
TESTx  
SGND  
COMP  
TRK  
TRK #1  
Figure 50 — PI354x-00 parallel operations  
Cool-Power® ZVS Switching Regulators  
Page 26 of 40  
Rev 1.8  
09/2018  
PI354x-00  
Output Voltage Set Point  
VOUT  
1
The PI354x-00 family of Buck Regulators utilizes an internal  
reference (VREF). The output voltage setting is accomplished using  
external resistors as shown in Figure 51. Select R2 to be at or  
around 1kΩ for best noise immunity. Use Equations (1) and (2) to  
determine the proper value based on the desired output voltage.  
V
OUT 2  
(a)  
Master VOUT  
VOUT  
VOUT  
2
LGH  
-
+
VLGH-REF  
R1  
R2  
EAIN  
(b)  
-
+
VREF  
t
EAO  
CHF  
RZI  
Figure 52 — PI354x-00 tracking methods  
COMP  
For Direct Tracking, choose the PI354x-00 with the highest output  
voltage as the master and connect the master to the TRK pin of  
the other PI354x-00 regulators through a divider (Figure 53) with  
the same ratio as the slave’s feedback divider.  
Figure 51 — External resistor divider network  
R1 + R2  
VOUT = VREF  
R1 = R2 •  
•
(1)  
(2)  
R2  
Master VOUT  
V
OUT – VREF  
VREF  
(
)
R1  
PI354x  
TRK  
where VREF = VEAIN  
Soft-Start Adjust and Tracking  
Slave  
R2  
SGND  
The TRK pin offers a means to increase the regulator’s soft-start  
time or to track with additional regulators. The soft-start slope  
is controlled by an internal capacitor and a fixed charge current  
to provide a Soft-Start Time tSS for all PI354x-00 regulators.  
By adding an additional external capacitor to the TRK pin, the  
soft-start time can be increased further. The following equation  
can be used to calculate the proper capacitor for a desired  
soft-start times:  
Figure 53 — Voltage divider connections for direct tracking  
All connected PI354x-00 regulator soft-start slopes will track with  
this method. Direct tracking timing is demonstrated in  
Figure 52b. All tracking regulators should have their Enable (EN)  
pins connected together to work properly.  
CTRK = tTRK • ITRK – 47 • 10-9  
(3)  
(
)
Inductor Pairing  
The PI354x-00 utilizes an external inductor. This inductor has  
been optimized for maximum efficiency performance. Table 2  
details the specific inductor value and part number utilized for  
each PI354x-00.  
Where, tTRK is the soft-start time and ITRK is a 50µA internal  
charge current (see Electrical Characteristics for limits).  
There is typically either proportional or direct tracking  
implemented within a design. For proportional tracking between  
several regulators at startup, simply connect all PI354x-00 device  
TRK pins together. This type of tracking will force all connected  
regulators to startup and reach regulation at the same time  
(see Figure 52a).  
Inductor  
(nH)  
Inductor  
Part Number  
Device  
Manufacturer  
PI3542-00  
PI3543-00  
PI3545-00  
PI3546-00  
340  
420  
420  
900  
FPT1006-340-R  
HCV1206-R42-R  
HCV1206-R42-R  
HCV1206-R90-R  
Eaton  
Eaton  
Eaton  
Eaton  
Table 2 — PI354x-00 Inductor pairing  
Cool-Power® ZVS Switching Regulators  
Page 27 of 40  
Rev 1.8  
09/2018  
PI354x-00  
Thermal De-rating  
The Control-Output transfer function (also known as the small  
signal modulator gain) has a single pole response determined  
by the parallel combination of RLOAD and rEQ and the output  
capacitor COUT. Equation (5) determines the frequency of the  
modulator pole:  
Thermal de-rating curves are provided that are based on  
component temperature changes versus load current, input  
voltage and air flow. It is recommended to use these curves as a  
guideline for proper thermal de-rating. These curves represent the  
entire system and are inclusive to both the Picor regulator and the  
external inductor. Maximum thermal operation is limited by either  
the MOSFETs or inductor depending upon line and  
load conditions.  
1
FP_MOD  
=
(5)  
RLOAD • rEQ  
RLOAD + rEQ  
2 • π •  
• COUT  
Thermal measurements were made using a standard  
PI354x-00 Evaluation board which is 2.5 x 4 inches in area and  
uses 4-layer, 2oz copper. Thermal measurements were made on  
the three main power devices, the two internal MOSFETs and the  
external inductor, with air flows of 0, 200, and 400LFM.  
Figure 55 depicts the small signal response of the modulator  
when perturbing EAO and measuring the differential gain and  
phase from EAO to VOUT  
.
Small Signal Model - Constant Voltage Mode  
20  
0
0
Gain - dBV  
Phase-Degrees  
The PI354x-00 product family is a variable frequency CCM/DCM  
ZVS Buck Regulator. The small signal model for this powertrain  
is that of a voltage controlled current source which has a  
trans-conductance that varies depending on the operating mode.  
When the converter is operating at its normal frequency, it is in  
discontinuous mode. As the load increases to the point at which  
the boundary between discontinuous and continuous modes is  
reached, the powertrain changes frequency to remain in critical  
conduction mode. This mode of operation allows the PI354x-00  
product family to have a very simple compensation scheme, as  
the control to output transfer function always has a slope of  
-1. In addition, when critical conduction is reached, the voltage  
controlled current source becomes nearly ideal with a high output  
equivalent resistance.  
20  
40  
20  
40  
60  
60  
80  
100  
1
10  
100  
Frequency- Hz  
1000  
10000  
100000  
Figure 55 — PI354x-00 Control-Output Gain/Phase Example  
VOUT  
Error Amplifier  
gMOD  
rEQ  
COUT  
RLOAD  
The small signal model of the error amplifier and compensator  
is shown in Figure 56. The error amplifier is a trans-conductance  
amplifier (TCA). The transfer function is shown in Equation (6),  
where in this example R1 = 2.3kΩ, R2 = 1kΩ, GMEAO = 5.1mS,  
ROUT = 1Meg, CHF = 56pF, Ccomp = 4.7nF and RZI = 5kΩ. Here  
it is important to note that the external components are Ccomp,  
R1 and R2. The other components are internal to each specific  
model. See the data tables section “Soft Start, Tracking And Error  
Amplifier” for details.  
+
VEAO  
Figure 54 — PI354x-00 Small Signal Model Control-Output  
VEAO  
The control to output transfer function of the PI354x-00 product  
family is defined as the gain from the output of the error  
GMEAO  
RZI  
amplifier, through the modulator and to the output voltage. The  
transfer function equation is shown in Equation (4), where gMOD is  
assumed to be 7S, rEQ = 0.4Ω, COUT = 600µF and RLOAD = 1Ω:  
CHF  
ROUT  
+
CCOMP  
VOUT  
R1  
R2  
gMOD  
1
rEQ  
GCO(s) =  
(4)  
1
+
+ s C  
(
)
OUT  
RLOAD  
Figure 56 — PI354x-00 Error Amplifier Model  
Cool-Power® ZVS Switching Regulators  
Page 28 of 40  
Rev 1.8  
09/2018  
PI354x-00  
100  
50  
0
80  
60  
40  
20  
0
Gain - dBV  
Phase-Degrees  
150  
Gain - dBV  
Phase-Degrees  
20  
40  
100  
50  
0
60  
80  
50  
100  
1000000  
1
10  
100  
1000  
10000  
100000  
1000000  
1
10  
100  
1000  
10000  
100000  
Frequency- Hz  
Frequency- Hz  
Figure 57 — PI354x-00 Input-Control Gain/Phase  
Figure 58 — PI354x-00 Output-Input Gain/Phase  
ROUT + s R • CCOMP • ROUT  
(
)
R2  
R1 + R2  
ZI  
(6)  
•
GIN_CTL(s) = GMEAO  
•
2
1 + s • CCOMP + CHF + s • CHF • CCOMP • RZI  
(
)
(
)
The transfer function of the error amplifier and compensator  
(also known as the Input To Control transfer function) reveals  
the response of a Type II amplifier with a low frequency pole  
determined by Equation (7), a zero which sets the mid-band  
gain determined by Equation (8) and a high frequency pole  
determined by Equation (9). Figure 58 shows the calculated  
Input To Control transfer function. Multiplying Equation (3) by  
Equation (6) ; described by Equation (10), results in the total loop  
gain (also known as the Output To Input transfer function). A  
graph is shown in Figure 58. The strategy is to set the zero such  
that the mid-band gain allows a high crossover frequency while  
providing maximum phase boost at crossover, with proper gain  
and phase margin.  
Lighting Mode (LGH)  
The Lighting (LGH) mode allows the PI354x-00 product family to  
be able to operate in constant current mode (CC) so that it can  
support a wide range of applications that require the ability to  
regulate current or voltage. Primary applications are LED lighting,  
battery / super-capacitor charging and high peak current pulse  
transient load applications. The PI354x-00 product family can  
operate in dual modes, either as a constant voltage (CV) regulator  
or a constant current (CC) regulator. Both modes can be utilized  
in a single system. The PI354x-00 family has a separate current  
amplifier, called LGH, and built in 100mV lighting reference that  
has its output connected to the EAO pin internally. If the current  
through an external shunt starts to develop 100mV at the LGH  
pin, the LGH amplifier will take over regulation by pulling down  
on the EAO output until the current is in regulation according  
to the designed shunt value. The LGH amplifier is a sink only  
trans-conductance amplifier (TCA). It does not source current.  
In the event of an open LED string or open current signal, the  
voltage loop can be set to regulate the output voltage to a safe or  
desired value in CV mode.  
1
FPLF  
FZMB  
FPHF  
=
=
=
= 33Hz  
(7)  
2 • π • R + R  
• CCOMP + CHF  
(
OUT ) (  
)
ZI  
1
= 6.8kHz  
(8)  
2 • π • (RZI // ROUT ) • CCOMP  
C
HF + CCOMP  
2 • π • (RZI // ROUT) • CCOMP • CHF  
= 580kHz  
(9)  
GOUT_IN(s) = GCO(s) • GIN_CTL(s)  
(10)  
Cool-Power® ZVS Switching Regulators  
Page 29 of 40  
Rev 1.8  
09/2018  
PI354x-00  
the internal reference, the voltage error amplifier acts as a 400µA  
current source pull up for the EAO pin.  
Figure 61 shows a small signal model of the modulator gain  
when using the application circuit shown in Figure 59 with two  
3.4V high current LED’s in series. RLED is the series combination  
of the AC resistance of each LED, which is 0.2Ω. RSHUNT is used  
to sense the current through the LED string. It has a value of  
50mΩ in this case. The other component values were defined  
earlier and remain the same values. Equation (12) defines the  
transfer function of the modulator and Equation (13) defines  
the pole of transfer function. The transfer function of the LGH  
amplifier is defined in Equation (14). The open loop gain of EINT is  
2500 and ELS = 4.4.  
L1  
VIN  
PGND  
VDR  
VIN  
VS1  
VOUT  
VSN  
VSP  
VDIFF  
LGH  
EAIN  
EAO  
COMP  
TRK  
VOUT  
CIN  
COUT  
PI354X  
R
C
R1  
R2  
SYNCO  
SYNCI  
PWRGD  
EN  
TESTx  
SGND  
RLGH  
RSHUNT  
Figure 59 — Lighting Configuration Using CC Mode  
VOUT  
When using the CC mode, it is important to set R1 and R2  
appropriately to avoid voltage loop interaction with the current  
loop. In this case, the voltage setting at the EAIN pin should be  
set so that the error between it and the 1V reference is sufficient  
to force the EAO to be open loop and source current always.  
When not using the LGH amplifier, the LGH pin should be  
connected to SGND.  
gMOD  
RLED  
rEQ  
COUT  
+
VLGH  
RSHUNT  
VEAO  
The LGH amplifier is able to sink more current than the error  
amplifier can source, thus avoiding arbitration issues when  
transitioning back and forth from LGH mode to voltage mode.  
The equation for setting the source current for EAO is shown  
in Equation (11).  
Figure 61 — Lighting Application Modulator Gain Model  
IEAO  
=
V
EAIN – VREF • GMEA > 400µA  
(11)  
(
)
Figure 62 is the Bode plot of the GLED(s) transfer function, which  
in LGH mode is what needs to be compensated for by the LGH  
amplifier and compensator. This transfer function defines the  
gain and phase from the error amplifier output (EAO) to the  
current shunt RSHUNT. Figure 65 is a plot of the transfer function  
GLGH_EAO(s), which defines the gain and phase from the LGH  
pin (voltage across current sensing RSHUNT) to EAO. As shown in  
Equation (14), the output is dependent on the integrator stage  
and the following trans-conductance stage. Figures 63 and 64  
show the two individual sections that make up Equation (14)  
which produces GLGH_EAO(s).  
LGH Amplifier Small Signal Model  
A small signal model of the LGH amplifier is shown in Figure 60.  
400µA  
lEAO  
VEAO  
GMLGH  
RZI  
CINT  
+
CHF  
ROUT  
+
VLGH  
+
RZI  
CCOMP  
EINT  
ELS  
0
20  
40  
60  
80  
0
Gain - dBV  
Phase-Degrees  
20  
40  
60  
80  
100  
Figure 60 — LGH Amplifier Small Signal Model  
The LGH amplifier consists of three distinct stages. The first  
is a wide bandwidth integrator stage, followed by a fixed  
gain level shift circuit. Finally, the level shift circuit drives a  
trans-conductance (TCA) amplifier with an open collector sink  
only output stage. Since the LGH output is internally connected  
to the output of the voltage error amplifier, the compensation  
components show up in the model and are used by both stages,  
depending on which one is in use. Only one stage should be in  
use at a time. When using LGH or if the LGH input rises above  
1
10  
100  
Frequency- Hz  
1000  
10000  
100000  
Figure 62 — GLED(s) Gain/Phase Plot  
Cool-Power® ZVS Switching Regulators  
Page 30 of 40  
Rev 1.8  
09/2018  
PI354x-00  
GLED(s) = gMOD • rEQ • RSHUNT  
R
SHUNT + RLED + rEQ + s COUT • rEQ • RLED+ RSHUNT • rEQ • COUT  
(12)  
(
) ((  
/
)
(
))  
1
FP_LED  
=
= 1.2kHz  
(13)  
(14)  
2 • π •  
R
LED + RSHUNT  
r
• C  
((  
)
)
// EQ  
OUT  
ROUT + s R • CCOMP • ROUT  
(
)
ZI  
G
LGH_EAO(s) = EINT (s) • ELS • GMLGH •  
2
1 + s • CCOMP + CHF + s • (CHF • CCOMP • RZI  
(
)
)
Where:  
1
EINT (s) = EINT  
•
(15)  
(16)  
1 + s • RLGH • CINT • EINT  
(
)
CHF + CCOMP  
• CCOMP • CHF  
FP_HF  
=
= 580kHz  
2 • π • R  
R
(
)
ZI //  
OUT  
The integrator pole is determined by the external input resistor RLGH and the internal CINT, which is 20pF. Assuming RLGH = 100kΩ and  
EINT = 2500:  
150  
100  
50  
0
0
80  
60  
40  
20  
0
Gain - dBV  
Phase-Degrees  
Gain - dBV  
Phase-Degrees  
20  
40  
60  
80  
100  
50  
100  
150  
0
20  
40  
50  
1
10  
100  
1000  
10000  
100000  
1000000  
1
10  
100  
Frequency- Hz  
1000  
10000  
100000  
Frequency- Hz  
Figure 65 — GLGH_EAO(s) Gain/Phase Plot RLGH = 100kΩ  
Figure 63 — EINT(s) Gain/Phase Plot RLGH = 100kΩ  
When combining Figure 63 with Figure 64, it becomes clear  
that additional compensation is needed to have enough phase  
and gain margin like can be seen with the voltage loop plot. We  
can remedy that easily, by adding a series R-C in parallel with  
RLGH as shown in the lighting application diagram in Figure 59.  
The capacitor will be chosen to work with RLGH to add a zero  
approximately 1.2kHz before the zero provided by the GMLGH(s)  
transfer function (the trans-conductance stage of the LGH  
amplifier). This value will be chosen to be 270pF. The external  
added resistor will form a high frequency pole to roll the gain  
off at higher frequency. This pole will be set at approximately  
120kHz so a common 4.99kΩ resistor will be used. The resulting  
Bode plot with the new compensator of GLGH_EAO(s) can be seen  
in Figure 66. Figure 67 shows the final Bode plot of the loop gain  
when using a lighting application with LED’s operating in constant  
current mode. Note that it is very important to understand the  
AC resistance of the LEDs that are being used. Please consult the  
LED manufacturer for details. For a series string, you should add  
the individual LED resistances and combine them into one lumped  
value to simplify the analysis.  
0
Gain - dBV  
Phase-Degrees  
80  
60  
40  
20  
0
20  
40  
60  
80  
100  
1
10  
100  
1000  
Frequency- Hz  
10000  
100000  
1000000  
Figure 64 — GMLGH(s) Gain/Phase Plot Voltage Loop Open  
Cool-Power® ZVS Switching Regulators  
Page 31 of 40  
Rev 1.8  
09/2018  
PI354x-00  
Input Filter Case 1; Inductive source and local, external,  
input decoupling capacitance with negligible ESR  
(i.e.: ceramic type):  
150  
100  
50  
0
Gain - dBV  
Phase-Degrees  
The voltage source impedance can be modeled as a series Rline  
Lline circuit. The high performance ceramic decoupling capacitors  
will not significantly damp the network because of their low ESR;  
therefore in order to guarantee stability the following conditions  
must be verified:  
50  
100  
150  
Lline  
Rline  
>
(17)  
CIN_INT + CIN_EXT • rEQ_IN  
(
)
0
1
10  
100  
1000  
Frequency- Hz  
10000  
100000  
1000000  
Rline << rEQ_IN  
(18)  
Where rEQ_IN can be calculated by dividing the lowest line voltage  
by the full load input current. It is critical that the line source  
impedance be at least an octave lower than the converter’s  
dynamic input resistance, Equation (18). However, Rline cannot  
be made arbitrarily low otherwise Equation (17) is violated  
and the system will show instability, due to an under-damped  
RLC input network.  
Figure 66 — GMLGH(s) Gain/Phase Plot Compensated  
150  
Gain - dBV  
Phase-Degrees  
150  
100  
50  
100  
50  
0
Input Filter case 2; Inductive source and local, external  
input decoupling capacitance with significant RCIN_EXT ESR  
(i.e.: electrolytic type):  
In order to simplify the analysis in this case, the voltage source  
impedance can be modeled as a simple inductor Lline  
.
50  
0
rEQ_IN > RC  
(19)  
IN_EXT  
1000000  
1
10  
100  
1000  
Frequency- Hz  
10000  
100000  
Lline  
CIN_INT • RC  
< rEQ_IN  
(20)  
IN_EXT  
Figure 67 — Lighting Application Loop Gain/Phase Plot  
Notice that the high performance ceramic capacitors CIN_INT  
within the PI354x-00 should be included in the external  
electrolytic capacitance value for this purpose. The stability  
criteria will be:  
Filter Considerations  
The PI354x-00 requires low impedance ceramic input capacitors  
(X7R/X5R or equivalent) to ensure proper start up and high  
frequency decoupling for the power stage. The PI354x-00  
will draw nearly all of the high frequency current from the  
low impedance ceramic capacitors when the main high side  
MOSFET(s) are conducting. During the time the MOSFET(s) are  
off, the input capacitors are replenished from the source. Table  
4 shows the recommended input and output capacitors to be  
used for the PI354x-00 as well as per capacitor RMS ripple current  
and the input and output ripple voltages. Table 5 includes the  
recommended input and output ceramic capacitors.  
Equation (20) shows that if the aggregate ESR is too small – for  
example by using very high quality input capacitors (CIN_EXT) – the  
system will be under-damped and may even become destabilized.  
As noted, an octave of design margin in satisfying Equation (19)  
should be considered the minimum.  
When applying an electrolytic capacitor for input filter damping  
the ESR value must be chosen to avoid loss of converter efficiency  
and excessive power dissipation in the electrolytic capacitor.  
It is very important to verify that the voltage supply source as well  
as the interconnecting lines are stable and do not oscillate.  
Cool-Power® ZVS Switching Regulators  
Page 32 of 40  
Rev 1.8  
09/2018  
PI354x-00  
VDR Bias Regulator  
System Design Considerations  
The VDR internal bias regulator is a ZVS switching regulator that  
resides internal to the PI354x-00 product family. It is intended  
strictly for use to power the internal controller and driver  
circuitry. The power capability of this regulator is sized only for  
the PI354x-00, with adequate reserve for the application it was  
intended for. It may be used for as a pull-up source for open  
collector applications and for other very low power use with the  
following restrictions:  
1. Inductive loads: As with all power electronic applications,  
consideration must be given to driving inductive loads that  
may be exposed to a fault in the system which could result  
in consequences beyond the scope of the power supply  
primary protection mechanisms. An inductive load could be a  
filter, fan motor or even excessively long cables. Consider an  
instantaneous short circuit through an un-damped inductance  
that occurs when the output capacitors are already at an  
initial condition of fully charged. The only thing that limits the  
current is the inductance of the short circuit and any series  
resistance. Even if the power supply is off at the time of the  
short circuit, the current could ramp up in the external inductor  
and store considerable energy. The release of this energy will  
result in considerable ringing, with the possibility of ringing  
nodes connected to the output voltage below ground. The  
system designer should plan for this by considering the use  
of other external circuit protection such as load switches,  
fuses, and transient voltage protectors. The inductive filters  
should be critically damped to avoid excessive ringing or  
damaging voltages. Adding a high current Schottky diode  
from the output voltage to PGND close to the PI354x-00 is  
recommended for these applications.  
1. The total external loading on VDR must be less than IVDR  
.
2. No direct connection is allowed. Any noise source that can  
disturb the VDR voltage can also affect the internal controller  
operation. A series inpedance is required between the VDR pin  
and any external circuitry.  
3. All loads must be locally de-coupled using a 0.1µF ceramic  
capacitor. This capacitor must be connected to the VDR output  
through a series resistor no smaller than 1kΩ, which forms a  
low-pass filter.  
2. Low voltage operation: There is no isolation from an SELV  
(Safety-Extra-Low-Voltage) power system. Powering low  
voltage loads from input voltages as high as 60V may require  
additional consideration to protect low voltage circuits from  
excessive voltage in the event of a short circuit from input to  
output. A fast TVS (transient voltage suppressor) gating an  
external load switch is an example of such protection.  
3. Use of Lighting Mode (LGH) as a battery charger is certainly  
very feasible. It is fashionable to design these chargers such  
that the battery is always connected to it. Since the Buck  
topology is not isolated, shorting the input terminals or  
capacitors of an unpowered regulator/charger could allow  
damaging current flow through the body diode of the high  
side MOSFET that would be unprotected by a conventional  
input fuse. It is recommended to connect the PI354x-00 family  
to the battery using an active ORing device if LGH mode is  
used as a constant current battery charger. The same should be  
considered for super-capacitor applications as well.  
Cool-Power® ZVS Switching Regulators  
Page 33 of 40  
Rev 1.8  
09/2018  
PI354x-00  
CINPUT  
Ceramic  
X7R  
CINPUT  
Ripple  
Current  
COUTPUT  
Ripple  
Current  
Load  
Step  
(A)  
VIN  
(V)  
ILOAD  
(A)  
COUTPUT  
Ceramic  
X7R  
Input  
Ripple  
(mVpp)  
Output Transient Recovery  
Device  
Ripple  
Deviation  
(mVpk)  
Time  
(µs)  
(mVpp)  
(ARMS  
)
(ARMS  
)
(Slew/µs)  
10  
5
416  
220  
464  
230  
485  
245  
880  
125  
47  
22  
5 x 2.2µF  
100V  
5
PI3542-00  
PI3543-00  
PI3545-00  
PI3546-00  
48  
48  
48  
48  
6 x 100µF  
6 x 100µF  
6 x 47µF  
6 x 10µF  
0.7  
1.32  
80  
90  
40  
40  
40  
20  
(1A/µs)  
10  
5
61.6  
31  
5 x 2.2µF  
100V  
5
0.8  
.88  
1.3  
(1A/µs)  
10  
5
62  
5 x 2.2µF  
100V  
5
1.37  
1.26  
150  
300  
(1A/µs)  
32  
9
114  
33  
5 x 2.2µF  
100V  
5
1.12  
(1A/µs)  
4.5  
Table 3 — Recommended input and output capacitance  
Murata Part Number  
GRM32ER72A225KA35  
GRM32EC70J107ME15  
GRM32ER71A476KE15  
GRM32ER61H106MA12  
Description  
2.2µF 100V 1210 X7R  
100µF 6.3V 1210 X7S:EIA  
47µF 10V 1210 X7R:EIA  
10µF 50V 1210 X5:EIA  
VIN  
CIN  
Table 4 — Capacitor manufacturer part numbers  
COUT  
Layout Guidelines  
To optimize maximum efficiency and low noise performance  
from a PI354x-00 design, layout considerations are necessary.  
Reducing trace resistance and minimizing high current loop  
returns along with proper component placement will contribute  
to optimized performance.  
Figure 69 — Current flow: Q1 closed  
A typical buck converter circuit is shown in Figure 68. The  
potential areas of high parasitic inductance and resistance are the  
circuit return paths, shown as LR below.  
When Q1 is on and Q2 is off, the majority of CIN’s current is used  
to satisfy the output load and to recharge the COUT capacitors.  
When Q1 is off and Q2 is on, the load current is supplied by the  
inductor and the COUT capacitor as shown in Figure 70. During  
this period CIN is also being recharged by the VIN. Minimizing CIN  
loop inductance is important to reduce peak voltage excursions  
when Q1 turns off. Also, the difference in area between the CIN  
loop and COUT loop is vital to minimize switching and GND noise.  
VIN  
CIN  
COUT  
VIN  
CIN  
Figure 68 — Typical Buck Regulator  
The path between the COUT and CIN capacitors is of particular  
importance since the AC currents are flowing through both of  
them when Q1 is turned on. Figure 69, schematically, shows the  
reduced trace length between input and output capacitors. The  
shorter path lessens the effects that copper trace parasitics can  
have on the PI354x-00 performance.  
COUT  
Figure 70 — Current flow: Q2 closed  
Cool-Power® ZVS Switching Regulators  
Page 34 of 40  
Rev 1.8  
09/2018  
PI354x-00  
The recommended component placement, shown in  
Figure 71, illustrates the tight path between CIN and COUT (and VIN  
and VOUT) for the high AC return current. This optimized layout is  
used on the PI354x-00 evaluation board.  
VOUT  
COUT  
GND  
VIN  
CIN  
VSW  
GND  
Figure 71 — Recommended component placement and  
metal routing  
Cool-Power® ZVS Switching Regulators  
Page 35 of 40  
Rev 1.8  
09/2018  
PI354x-00  
Recommended PCB Footprint and Stencil  
E1  
PIN 1  
e
L
b
D1  
e
e
PCB LAND PATTERN  
PI354X  
DIMENSIONAL REFERENCES  
REF.  
MIN.  
0.50  
NOM.  
MAX.  
0.60  
b & L  
D1  
E1  
0.55  
9.00 BSC  
9.00 BSC  
1.00 BSC  
e
The recommended receiving footprint for PI354x-00 10mm x 10mm package. All pads should have a final copper size of 0.55mm x  
0.55mm, whether they are solder-mask defined or copper defined, on a 1mm x 1mm grid. All stencil openings are 0.45mm when using  
either a 5mil or 6mil stencil.  
Cool-Power® ZVS Switching Regulators  
Page 36 of 40  
Rev 1.8  
09/2018  
PI354x-00  
LGA Package Drawings  
A
K
G
E
D
A
3
D
E
DETAIL B  
DETAIL A  
L
M
A
M
M
M
A
L
3
A
DETAIL B  
SCALE 36 : 1  
SEATING PLANE  
METALLIZED  
PAD  
A
SOLDER MASK  
DETAIL A  
L
D
E
Cool-Power® ZVS Switching Regulators  
Page 37 of 40  
Rev 1.8  
09/2018  
PI354x-00  
BGA Package Drawings  
BALL "A1" CORNER  
INDEX AREA  
E1  
A
BALL "A1" CORNER  
INDEX AREA  
K
J
H
G
F
E
D
C
B
A
1
2
3
4
5
6
7
8
e
2
DATUM A  
D
D1  
NX  
b
4
M
0.25  
C
A B  
9
10  
(2X)  
C
aaa  
E
e
2
DATUM B  
TOP VIEW  
B
BOTTOM VIEW  
bbb  
C
A
5
SEATING PLANE  
A1  
C
SIDE VIEW  
DIMENSIONAL REFERENCES  
REF.  
A
MIN.  
2.96  
0.44  
NOM.  
3.05  
MAX.  
NOTES:  
1. ALL DIMENSIONS ARE IN MILLIMETERS.  
3.14  
0.54  
A1  
D
0.49  
2. 'e' REPRESENTS THE BASIC SOLDER BALL GRID PITCH.  
10.50  
9.00 BSC  
10.50  
9.00 BSC  
0.64  
3. 'M' REPRESENTS THE BASIC SOLDER BALL MATRIX SIZE.  
D1  
E
AND SYMBOL 'n' IS THE NUMBER OF BALLS AFTER DEPOPULATING.  
4. 'b' IS MEASURABLE AT THE MAXIMUM SOLDER BALL DIAMETER AFTER REFLOW  
E1  
b
PARALLEL TO PRIMARY DATUM  
C .  
0.59  
0.69  
5. PRIMARY DATUM AND SEATINGPLANE ARE DEFINED BY THE SPERICAL  
C
aaa  
bbb  
e
0.20  
CROWNS OF THE SOLDER BALLS.  
6. PACKAGE SURFACE SHALL BE MATTE FINISH CHARMILLES 24 TO 27.  
7. SUBSTRATE MATERIAL BASE IS BT RESIN.  
0.25  
1.00 BSC  
10  
8. THE OVERALL PACKAGE THICKNESS "A" ALREADY CONSIDERS COLLAPSE BALLS  
9. DIMENSIONING AND TOLERANCING PER ASME Y14.5M 1994.  
10. RoHS COMPLIANT PER CST-0001 LATEST REVISION.  
M
n
85  
Cool-Power® ZVS Switching Regulators  
Page 38 of 40  
Rev 1.8  
09/2018  
PI354x-00  
Revision History  
Revision  
1.0 - 1.1  
1.2  
Date  
Description  
Released Engineering format/style  
Page Number(s)  
05/2015  
10/12/15  
02/19/16  
n/a  
n/a  
34  
Reformatted in new template  
Updated PCB Footprint  
1.3  
Typo correction  
7 & 25  
Correction to Conditions on Switching Frequency  
Updated Input OVLO Threshold  
TRK function performance enhancement  
Updated package drawing  
8
1.4  
1.5  
05/09/16  
11/08/16  
8, 12, 16 & 20  
9, 13, 17 & 21  
35  
Features and Applications Lists Updated  
1
7
LGH Reference Max changed from 105 to 107mV  
Input Quiescent Current Performance improved  
EN section moved to common electrical specifications on pg 7 & removed from  
individual product electrical specifications.  
8, 12, 16 & 20  
7, 9, 13, 17 & 21  
Table 4 Capacitor Part Numbers updated  
Package Outline Drawing updated  
34  
36  
Amendments to Absolute Maximum Ratings  
Clarifications to Enable, Protection and Soft Start, Tracking and Error Amplifier  
Package drawings updated  
4
8, 10  
6, 36, 37  
25, 26, 27  
26  
1.6  
03/09/17  
Corrections to Figures 49, 50, 51  
Updated Overtemperature Protection  
Output Voltage Set Point description updated  
Equations amended  
27  
27, 31, 32  
Updated land pattern and LGA package drawing  
Added BGA package information  
36, 37  
38  
1.7  
1.8  
08/08/18  
09/14/18  
Correction to BGA height measurement  
1
Please note: one page added in Rev 1.6, 1.7.  
Cool-Power® ZVS Switching Regulators  
Page 39 of 40  
Rev 1.8  
09/2018  
PI354x-00  
Vicor’s comprehensive line of power solutions includes high density AC-DC and DC-DC modules and  
accessory components, fully configurable AC-DC and DC-DC power supplies, and complete custom  
power systems.  
Information furnished by Vicor is believed to be accurate and reliable. However, no responsibility is assumed by Vicor for its use. Vicor  
makes no representations or warranties with respect to the accuracy or completeness of the contents of this publication. Vicor reserves  
the right to make changes to any products, specifications, and product descriptions at any time without notice. Information published by  
Vicor has been checked and is believed to be accurate at the time it was printed; however, Vicor assumes no responsibility for inaccuracies.  
Testing and other quality controls are used to the extent Vicor deems necessary to support Vicor’s product warranty. Except where  
mandated by government requirements, testing of all parameters of each product is not necessarily performed.  
Specifications are subject to change without notice.  
Visit http://www.vicorpower.com/dc-dc-converters-board-mount/cool-power-pi33xx-and-pi34xx for the latest product information.  
Vicor’s Standard Terms and Conditions and Product Warranty  
All sales are subject to Vicor’s Standard Terms and Conditions of Sale, and Product Warranty which are available on Vicor’s webpage  
(http://www.vicorpower.com/termsconditionswarranty) or upon request.  
Life Support Policy  
VICOR’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE  
EXPRESS PRIOR WRITTEN APPROVAL OF THE CHIEF EXECUTIVE OFFICER AND GENERAL COUNSEL OF VICOR CORPORATION. As used  
herein, life support devices or systems are devices which (a) are intended for surgical implant into the body, or (b) support or sustain life and  
whose failure to perform when properly used in accordance with instructions for use provided in the labeling can be reasonably expected to  
result in a significant injury to the user. A critical component is any component in a life support device or system whose failure to perform  
can be reasonably expected to cause the failure of the life support device or system or to affect its safety or effectiveness. Per Vicor Terms  
and Conditions of Sale, the user of Vicor products and components in life support applications assumes all risks of such use and indemnifies  
Vicor against all liability and damages.  
Intellectual Property Notice  
Vicor and its subsidiaries own Intellectual Property (including issued U.S. and Foreign Patents and pending patent applications) relating to the  
products described in this data sheet. No license, whether express, implied, or arising by estoppel or otherwise, to any intellectual property  
rights is granted by this document. Interested parties should contact Vicor’s Intellectual Property Department.  
The products described on this data sheet are protected by U.S. Patents. Please see www.vicorpower.com/patents for the latest  
patent information.  
Contact Us: http://www.vicorpower.com/contact-us  
Vicor Corporation  
25 Frontage Road  
Andover, MA, USA 01810  
Tel: 800-735-6200  
Fax: 978-475-6715  
www.vicorpower.com  
email  
Customer Service: custserv@vicorpower.com  
Technical Support: apps@vicorpower.com  
©2018 Vicor Corporation. All rights reserved. The Vicor name is a registered trademark of Vicor Corporation.  
All other trademarks, product names, logos and brands are property of their respective owners.  
Cool-Power® ZVS Switching Regulators  
Page 40 of 40  
Rev 1.8  
09/2018  

相关型号：

SI9130DB

 5- and 3.3-V Step-Down Synchronous Converters

Warning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
-
VISHAY

SI9135LG-T1

 SMBus Multi-Output Power-Supply Controller

Warning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
-
VISHAY

SI9135LG-T1-E3

 SMBus Multi-Output Power-Supply Controller

Warning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
-
VISHAY

SI9135_11

 SMBus Multi-Output Power-Supply Controller

Warning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
-
VISHAY

SI9136_11

 Multi-Output Power-Supply Controller

Warning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
-
VISHAY

SI9130CG-T1-E3

 Pin-Programmable Dual Controller - Portable PCs

Warning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
-
VISHAY

SI9130LG-T1-E3

 Pin-Programmable Dual Controller - Portable PCs

Warning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
-
VISHAY

SI9130_11

 Pin-Programmable Dual Controller - Portable PCs

Warning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
-
VISHAY

SI9137

 Multi-Output, Sequence Selectable Power-Supply Controller for Mobile Applications

Warning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
-
VISHAY

SI9137DB

 Multi-Output, Sequence Selectable Power-Supply Controller for Mobile Applications

Warning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
-
VISHAY

SI9137LG

 Multi-Output, Sequence Selectable Power-Supply Controller for Mobile Applications

Warning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
-
VISHAY

SI9122E

 500-kHz Half-Bridge DC/DC Controller with Integrated Secondary Synchronous Rectification Drivers

Warning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
-
VISHAY
©2020 ICPDF网 联系我们和版权申明