首页 |元器件品牌

AT1397AN [AIMTRON]

6-Channel DC-DC Converter for DSC; 6通道DC-DC转换器，用于DSC
AT1397AN
型号： AT1397AN
厂家： AIMTRON TECHNOLOGY    AIMTRON TECHNOLOGY
描述：

6-Channel DC-DC Converter for DSC
6通道DC-DC转换器，用于DSC

转换器 DC-DC转换器
文件： 总21页 (文件大小：685K)
中文：  中文翻译
下载：  下载PDF数据表文档文件
 查看货源
AT1397A/B  
Preliminary Product Information  
6-Channel DC-DC Converter for DSC  
Features  
General Description  
• 95% Efficient possible DC/DC Converter  
• Bulit-in LED Driver and Open LED  
Overvoltage Protection  
The AT1397A/B provide a complete power  
supply solution for digital cameras. They improve  
performance, component count, and size compared  
to other multi-channel controllers in 1-cell Li-Ion  
designs. On-chip MOSFETs provide up to 92~95%  
efficiency for critical power supplies, while  
additional channels operate with external FETs for  
optimum design flexibility. All channels DC/DC  
operate at one fixed frequency settable from  
100KHz to 1MHz to optimize size, cost, and  
efficiency.  
• Transformerless Inverting Controller for CCD  
Bias  
• 2 Channel Built-in MOSFET Current- Mode  
PWM and 4 Channel Extra PWM Controllers  
(CH-3 Synchronous Output)  
• Up to 1MHz Operating Frequency  
• Shutdown Current <1uA  
• Built-in Soft-Start Function  
Built-in Short-Circuit Protection Function  
• QFN48 Package  
Applications  
• DSC Power Supply  
Pin Assignment  
AT1397AN  
AT1397BN  
36  
35  
34  
33  
32  
31  
30  
29  
28  
27  
26  
25  
CH1  
CH1  
Synchronous Rectified  
Current Mode Step-Down  
On-Chip MOSFET  
Synchronous Rectified  
Current Mode Step-Down  
On-Chip MOSFET  
37  
38  
39  
40  
41  
42  
43  
44  
45  
46  
47  
48  
24  
23  
22  
21  
20  
19  
18  
17  
16  
15  
14  
13  
CH2  
CH2  
Synchronous Rectified  
Current Mode Step-Down  
On-Chip MOSFET  
Synchronous Rectified  
Current Mode Step-Down  
On-Chip MOSFET  
AT1397  
CH3  
CH3  
Synchronous Rectified  
Voltage Mode Step-Down  
Synchronous Rectified  
Voltage Mode Step-Down  
CH4  
CH4  
Seletable Voltage Mode  
Step-Up/Down/Inverting  
Seletable Voltage Mode  
Step-Up/Down/Inverting  
CH5  
CH5  
Voltage Mode PWM  
Step-Up  
Voltage Mode PWM  
LED Driver  
CH6  
CH6  
1
2
3
4
5
6
7
8
9
10  
11  
12  
Voltage Mode Step-Up  
Voltage Mode Step-Up  
Ordering Information  
Part Number  
Package  
QFN48,Green  
B:1397BN  
Marking  
AT1397 N  
A:1397AN  
：
： Date Code  
*For more marking information, contact our sales representative directly.  
Aimtron reserves the right without notice to change this circuitry and specifications.  
7F, No.9, Park Avenue II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.  
Tel: 886-3-563-0878  
Fax: 886-3-563-0879  
WWW: http://www.aimtron.com.tw  
Email: service@aimtron.com.tw  
1/10/2006  
REV:1.0  
1
AT1397A/B  
Preliminary Product Information  
6-Channel DC-DC Converter for DSC  
Block Diagram  
COMP1  
FB1  
-
PVCC1  
Step-  
-
Down  
Pre-  
0.8V  
+
-
+
Driver  
SS1  
LX1  
SS1OK  
Ramp1  
CTL1  
Current  
PGND1  
Sense  
COMP2  
FB2  
SS1OK  
-
PVCC2  
Step-  
-
Down  
Pre-  
+
-
0.8V  
+
Driver  
SS2  
LX2  
Power  
Good  
/SDOK  
CTL2  
Ramp2  
Current  
PGND2  
Sense  
PVCC3  
COMP3  
FB3  
SS1OK  
+
-
OUT3S  
Step-  
Down  
Pre-  
+
+
-
0.8V  
Driver  
SS3  
OUT3M  
PGND3  
OSC1  
CTL3  
SEL4  
COMP4  
IN4  
SS1OK  
PVCC4  
Step-  
Up/  
-
+
+
-
IP4  
OUT4  
+
Down  
Pre-  
SS4  
Driver  
*Selectable P-ch or N-ch  
driver for step-down/up/  
inverting converter  
CTL4  
OSC2  
FB5H  
COMP5  
FB5  
+
OVP  
-
1V  
SS1OK  
-
Step-  
Up  
+
+
-
+
OUT5  
OUT6  
Pre-  
VREF  
Driver  
SS5  
CTL5  
*Metal Option  
LED Driver (VREF=0.2V)  
or Step-Up(VREF=0.8V)  
OSC1  
OSC2  
COMP6  
FB6  
SS1OK  
-
Step-  
Up  
0.8V  
+
+
-
+
Pre-  
Driver  
SS6  
CTL6  
SCP3 SCP4 SCP5 SCP6 OVP  
OSC1 OSC2  
Ramp1 Ramp2  
Ramp  
Gen  
Short-Circuit  
Protection  
OSC  
CT  
CSCP  
VCC  
0.8V  
CTLU  
UVLO  
2V  
1.22V  
LDO  
VBGEN  
VRGEN  
2.3V  
GND  
VBG  
VREG  
7F, No.9, Park Avenue II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.  
Tel: 886-3-563-0878  
1/10/2006 REV:1.0  
Fax: 886-3-563-0879  
WWW: http://www.aimtron.com.tw  
Email: service@aimtron.com.tw  
2
AT1397A/B  
Preliminary Product Information  
6-Channel DC-DC Converter for DSC  
Pin Description  
Symbol  
Pin No.  
Descript  
SS1  
CTL5  
CTL6  
LX1  
CTL1  
PGND1  
PGND2  
CTL2  
LX2  
CTL3  
CTL4  
SS2  
1
CH1 Soft-Start Input  
2
CH5 Enable Input  
3
CH6 Enable Input  
4
CH1 Converter Switching Node  
CH1 Enable and Chip Enable Input  
Power Ground  
5
6
7
Power Ground  
CH2 Enable Input  
8
9
CH2 Converter Switching Node  
CH3 Enable Input  
10  
11  
12  
13  
14  
15  
16  
17  
18  
19  
20  
21  
22  
23  
24  
25  
26  
27  
28  
29  
30  
31  
32  
33  
34  
35  
36  
37  
38  
39  
40  
41  
42  
43  
44  
45  
46  
47  
48  
CH4 Enable Input  
CH2 Soft-Start Input  
/SDOK  
CSCP  
PVCC2  
COMP2  
FB2  
Open-Drain, Active Low, Power Good for CH2  
Short Circuit Protection Input  
CH2 Converter Input  
CH2 Controller Compensation Node  
CH2 Converter Feedback Input  
CH3 Soft-Start Input  
SS3  
COMP3  
FB3  
CH3 Compensation Node  
CH3 Feedback Input  
CH4 Soft-Start Input  
SS4  
COMP4  
IN4  
CH4 Compensation Node  
CH4 Negative Feedback Input  
CH4 Positive Feedback Input  
CH3 Power Input  
CH3 Master Output Driver  
CH3 Slave Output Driver  
Power Ground  
IP4  
PVCC3  
OUT3M  
OUT3S  
PGND3  
OUT4  
OUT5  
OUT6  
PVCC4  
GND  
CH4 Output Driver  
CH5 Output Driver  
CH6 Output Driver  
CH4, CH5 and CH6 Power Input  
Power Ground  
CH5 Controller Over Voltage Protection Input  
CH5 Controller Voltage Feedback/Current Feedback  
CH5 Compensation Node  
Reference Bypass  
FB5H  
FB5  
COMP5  
VBG  
SS5  
FB6  
CH5 Soft-Start Input  
CH6 Feedback Input  
COMP6  
CT  
CH6 Compensation Node  
Oscillator Control  
VREG  
FB1  
Reference Output  
CH1 Converter Feedback Input  
CH1 Controller Compensation Node  
IC Power Input  
COMP1  
VCC  
PVCC1  
SS6  
CH1 Converter Input  
CH6 Soft-Start Input  
SEL4  
Configures the CH4 as a Step-Up or Step-Down  
7F, No.9, Park Avenue II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.  
Tel: 886-3-563-0878  
1/10/2006 REV:1.0  
Fax: 886-3-563-0879  
WWW: http://www.aimtron.com.tw  
Email: service@aimtron.com.tw  
3
AT1397A/B  
Preliminary Product Information  
6-Channel DC-DC Converter for DSC  
Absolute Maximum Ratings*1  
Rated Value  
Min. Max.  
Parameter  
Symbol  
Units  
Storage Temperature  
TSTG  
TOPR  
-55  
-35  
-0.3  
-0.3  
-0.3  
-
150  
85  
℃
℃
V
Operating Temperature TA  
PVCC1,PVCC2,PVCC3,PVCC4 Input Voltage  
LX1,LX2, OUT3M,OUT3S Input Voltage  
Other Input Pin  
6.0  
6.0  
6.0  
2.25  
200  
2
-
VLX/OUT  
V
-
-
V
LX1, LX2 Current  
A
OUT3M,OUT3S Current  
-
-
mA  
KV  
V
HBM  
MM  
Pd  
-
ESD Susceptibility*2  
-
200  
1000  
Power Consumption  
-
mW  
1. Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the  
device. These are stress ratings only, and functional operation of the device at these or any other  
conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure  
to absolute maximum rating conditions for extended periods may affect device reliability.  
2. Device are ESD sensitive. Handling precaution recommended. The Human Body model is a 100pF  
capacitor discharged through a 1.5KΩ resistor into each pin.  
Recommended Operating Conditions  
(Ta=+250C)  
Value  
Typ  
Parameter  
Symbol  
Unit  
Min  
2.5  
2.5  
0
Max  
5.5  
Startup power supply voltage  
Power supply voltage  
Vcc  
PVCC  
VIN  
--  
V
V
--  
5.5  
Feedback input voltage  
Control input voltage  
--  
Vcc-2  
Vcc  
1.0  
V
VCTL  
CSS  
0
--  
V
Soft start capacitor  
--  
0.1  
0.1  
0.1  
25  
µF  
µF  
µF  
℃
Short Circuit Protection Capacitor  
VREG pin capacitor  
CSCP  
CVREG  
--  
1.0  
0.082  
-20  
--  
T
Operating ambient temperature*  
85  
A
*Using X5R or X7R input capacitors.  
7F, No.9, Park Avenue II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.  
Tel: 886-3-563-0878  
1/10/2006 REV:1.0  
Fax: 886-3-563-0879  
WWW: http://www.aimtron.com.tw  
Email: service@aimtron.com.tw  
4
AT1397A/B  
Preliminary Product Information  
6-Channel DC-DC Converter for DSC  
Electrical Characteristics  
(PVCC1=PVCC2=PVCC3=PVCC4=VCC=3.6V, Ta=+250C)  
Values  
Parameter  
GENERAL  
Symbol  
Condition  
Unit  
Min. Typ. Max.  
Input Voltage Range  
VCC IC Power Input  
2.5  
2.35  
-
-
5.5  
2.45  
-
V
V
VCC Under Voltage Lockout  
UVLO Hysteresis  
VUV  
VHY  
-
2.4  
100  
-
mV  
No Switching,  
CH1,CH2 Switch- Off Input  
Current  
FB1=FB2=0.9V  
CTL1=CTL2=3.6V, other  
disable  
IIN1  
-
1.1  
1.2  
mA  
No Switching,  
CH1,CH2, CH3(or 4,5,6)  
Switch- Off Input Current  
FB1=FB2=FB3=0.9V  
CTL1=CTL2=CTL3=3.6V,  
other disable  
IIN2  
-
-
1.3  
1
1.4  
10  
mA  
µA  
All CTL disable,  
VCC=3.6V  
Shutdown Current  
ICC  
REFERENCE  
Reference Output Voltage  
Reference Load Regulation  
Reference Line Regulation  
VREG IREG =1mA  
2.25 2.30 2.35  
V
1mA< IREG <5mA  
-
-
5
-
10  
5
mV  
mV  
∆VREG1  
∆VREG2  
2.5<VCC<5.5V  
OSC  
Frequency  
fOSC CT=82pF  
-
-
-
500  
1
-
10  
5
KHz  
%
Frequency variation with  
Temperature  
Frequency variation with  
Input Voltage  
T =-20°C ~+85°C  
∆fOSC1  
∆fOSC2  
a
VCC =2.5V~5.5V  
1
%
CHANNEL 1, 2  
PVCC1/2  
Input Voltage Range  
-
2.5  
0.7  
-
5.5  
1.3  
V
µA  
V
Normal Operating Soft-Start  
Charge Current  
ISS1/2 VCC =2.5V~5.5V  
T =-20°C ~+85°C  
1
FB Regulation Voltage  
VFB1/2  
0.784 0.8 0.816  
a
FB input Current  
IFB1/2 FB1/2=0.8V  
RCS  
-
-
-
-
-
100  
nA  
V/A  
µs  
Current-Sense Amplifier  
Transresistance  
-
-
0.6  
120  
100  
-
-
-
Transconductance  
GMEA  
Maximum Duty Cycle  
DMAX FB1/2=0.7V  
%
7F, No.9, Park Avenue II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.  
Tel: 886-3-563-0878  
1/10/2006 REV:1.0  
Fax: 886-3-563-0879  
WWW: http://www.aimtron.com.tw  
Email: service@aimtron.com.tw  
5
AT1397A/B  
Preliminary Product Information  
6-Channel DC-DC Converter for DSC  
V
=0~3.6V  
LX Leakage Current  
Switch On-Resistance  
ILX1/2  
RN  
-
-
1
5
250  
300  
1.4  
-
µA  
mΩ  
mΩ  
A
LX1/2  
N-Channel  
P-Channel  
200  
250  
1.2  
20  
RP  
-
P-Channel Current Limit  
N-Channel Turn-off Current  
/SDOK Output Low Voltage  
/SDOK Leakage current  
ILimit2  
IREV2  
-
-
1.0  
-
mA  
V
VSDOK 0.1mA into /SDOK  
-
0.01  
0.1  
0.1  
1
IL_SDOK CTL2=0V, /SDOK=5.5V  
-
µA  
CHANNEL 3  
PVCC3  
ISS3  
Input Voltage Range  
-
VCC =2.5V~5.5V  
FB3=0.8V  
2.5  
0.7  
-
-
1
-
5.5  
1.3  
100  
V
Normal Operating Soft-Start  
Charge Current  
µA  
nA  
FB3 input Current  
IFB3  
T =-20°C ~+85°C,  
FB3=COMP3  
DC  
a
FB3 Regulation Voltage  
Error Amplifier Voltage Gain  
VFB3  
AV  
0.784 0.8 0.816  
V
80  
-
-
5
-
-
dB  
MHz  
V
Error Amplifier Frequency  
Bandwidth  
BW AV=0dB  
V
-
-
-
1.0  
10  
-
OH  
Error Amplifier Output  
Voltage  
V
-
-
mV  
mA  
µA  
%
OL  
I
COMP=0.8V  
COMP=0.8V  
-
1
-
source  
Error Amplifier Output  
Source/Sink Current  
I
-
60  
-
sink  
Maximum Duty Cycle  
DMAX FB3=0.7V  
-
100  
-130  
100  
18  
-
DUTY=90%,OUT=1/2VC  
C
I
-
-80  
-
mA  
mA  
Ω
source  
Output Source/Sink Current  
I
DUTY=0%,OUT=1/2VCC  
65  
-
sink  
R
OH  
OUT=-15mA  
30  
25  
Output On-Resistor  
R
OL  
OUT=15mA  
-
16  
Ω
CHANNEL 4, 5, 6  
Input Voltage Range  
PVCC4 CH4, 5, 6  
2.5  
0.7  
-
5.5  
1.3  
V
µA  
V
Normal Operating Soft-Start  
Charge Current  
ISS4/5/6 VCC =2.5V~5.5V  
1
T =-20°C ~+85°C,  
a
FB4/5/6 Regulation Voltage  
VFB4/5/6  
0.784 0.8 0.816  
0.19 0.20 0.21  
FB_=COMP_  
T =-20°C ~+85°C,  
FB5 Regulation Voltage for  
LED Driver  
a
VFB5  
V
FB5=COMP5  
7F, No.9, Park Avenue II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.  
Tel: 886-3-563-0878  
1/10/2006 REV:1.0  
Fax: 886-3-563-0879  
WWW: http://www.aimtron.com.tw  
Email: service@aimtron.com.tw  
6
AT1397A/B  
Preliminary Product Information  
6-Channel DC-DC Converter for DSC  
T =-20°C ~+85°C,  
FB5H OVP Trip Level  
VFB5H  
AV  
0.98 1.00 1.02  
V
dB  
MHz  
V
a
Error Amplifier Voltage Gain  
DC  
80  
-
-
5
-
-
Error Amplifier Frequency  
Bandwidth  
BW AV=0dB  
V
-
-
-
1.0  
10  
1
-
OH  
Error Amplifier Output  
Voltage  
V
-
-
mV  
mA  
µA  
%
OL  
I
COMP=0.8V  
COMP=0.8V  
-
-
source  
Error Amplifier Output  
Source/Sink Current  
I
-
60  
90  
90  
-130  
100  
18  
16  
-
sink  
DMAX FB_=0.7V  
DMAX FB5=0.1V  
85  
85  
-
95  
95  
-80  
-
Maximum Duty Cycle  
Output Source/Sink Current  
Output On-Resistor  
%
DUTY=90%,OUT=1/2VC  
C
I
mA  
mA  
Ω
source  
I
DUTY=0%,OUT=1/2VCC  
65  
-
sink  
R
OH  
OUT=-15mA  
30  
25  
R
OL  
OUT=15mA  
-
Ω
SHORT CIRCUIT PROTECTION  
V
V
Threshold Voltage  
CH3,CH4,CH5,CH6  
CH3,CH4,CH5,CH6  
CH3,CH4,CH5,CH6  
-
-
0.9  
0.7  
1
-
-
V
V
TH  
TH  
VCSCP Detect Voltage  
CSCP Charge Current  
I
0.7  
1.3  
µA  
CSCP  
CONTROL BLOCK  
CTL Input Voltage  
CTL Hysteresis  
V
Active Mode  
1.5  
0
-
-
VCC  
0.5  
-
V
V
IH  
V
Standby Mode  
IL  
△VH  
-
Step-Up Type  
Step-Down Type  
-
-
100  
-
mV  
V
V
1.5  
0
VCC  
0.5  
-
IH  
SEL4 Input Voltage  
SEL4 Hysteresis  
V
-
V
IL  
△VH  
-
100  
mV  
7F, No.9, Park Avenue II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.  
Tel: 886-3-563-0878  
1/10/2006 REV:1.0  
Fax: 886-3-563-0879  
WWW: http://www.aimtron.com.tw  
Email: service@aimtron.com.tw  
7
AT1397A/B  
Preliminary Product Information  
6-Channel DC-DC Converter for DSC  
Typical Characteristics  
CH1,2 Efficiency VS. Load Current  
CH1,2 Efficiency VS. Load Current  
100  
100  
90  
80  
70  
60  
50  
90  
80  
70  
VBAT=4.2V  
VBAT=3.8V  
VBAT=3.6V  
VBAT=3.3V  
VBAT=3.0V  
VBAT=2.5V  
VBAT=4.2V  
VBAT=3.8V  
VBAT=3.6V  
60  
Vout =1.8V  
Vout =3.3V  
50  
10  
100  
1000  
10  
100  
1000  
Load Current(mA)  
Load Current(mA)  
CH3 Efficiency VS. Load Current  
CH4,5,6 Efficiency VS. Load Current  
100  
90  
80  
70  
60  
50  
100  
90  
80  
70  
60  
50  
VBAT=4.2V  
VBAT=4.2V  
VBAT=3.8V  
VBAT=3.6V  
VBAT=3.3V  
VBAT=3.0V  
VBAT=2.5V  
VBAT=3.8V  
VBAT=3.6V  
VBAT=3.3V  
Vout =3.0V  
Vout =5.0V  
10  
100  
1000  
10  
100  
1000  
Load Current(mA)  
Load Current(mA)  
CH4,5,6 Efficiency VS. Load Current  
CH4 Efficiency VS. Load Current  
100  
90  
80  
70  
60  
50  
40  
30  
20  
10  
0
100  
90  
80  
70  
60  
50  
40  
30  
20  
10  
0
VBAT=4.2V  
VBAT=4.2V  
VBAT=3.8V  
VBAT=3.6V  
VBAT=3.3V  
VBAT=3.0V  
VBAT=2.5V  
VBAT=3.8V  
VBAT=3.6V  
VBAT=3.3V  
VBAT=3.0V  
VBAT=2.5V  
Vout=15V  
Vout =-7.5V  
1
10  
100  
1
10  
100  
Load Current(mA)  
Load Current(mA)  
7F, No.9, Park Avenue II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.  
Tel: 886-3-563-0878  
1/10/2006 REV:1.0  
Fax: 886-3-563-0879  
WWW: http://www.aimtron.com.tw  
Email: service@aimtron.com.tw  
8
AT1397A/B  
Preliminary Product Information  
6-Channel DC-DC Converter for DSC  
Typical Characteristics (Continued )  
Efficiency VS. Input Voltage  
100  
No-Load Input Current VS. Input Voltage  
1.6  
Vout1,2=3.3V  
Iout1,2=300mA  
1.4  
1.2  
95  
Vout1,2=1.8V  
Iout1,2=300mA  
Vout3=3.0V  
Iout3=300mA  
90  
85  
80  
1.0  
CH1  
CH1+CH2  
0.8  
Vout4=5.0V  
Iout4=50mA  
0.6  
2.5  
3.0  
3.5  
4.0  
4.5  
2.5  
3.0  
3.5  
4.0  
4.5  
5.0  
5.5  
6.0  
100  
100  
Input Voltage-VIN (V)  
Input Voltage-VIN (V)  
Switching Frequency VS. Temperature  
Reference Voltage VS. Temperature  
520  
510  
500  
490  
480  
470  
460  
2.305  
2.300  
2.295  
2.290  
2.285  
2.280  
2.275  
-20  
0
20  
40  
60  
80  
100  
-20  
0
20  
40  
60  
80  
Temperature  
Temperature  
Maximum Duty VS. Temperature  
FB Regulation Voltage VS. Temperature  
0.805  
0.800  
0.795  
0.790  
0.785  
96  
95  
94  
93  
92  
91  
90  
89  
88  
87  
P-MOS  
N-MOS  
-20  
0
20  
40  
60  
80  
100  
-20  
0
20  
40  
60  
80  
Temperature  
Temperature  
7F, No.9, Park Avenue II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.  
Tel: 886-3-563-0878  
1/10/2006 REV:1.0  
Fax: 886-3-563-0879  
WWW: http://www.aimtron.com.tw  
Email: service@aimtron.com.tw  
9
AT1397A/B  
Preliminary Product Information  
6-Channel DC-DC Converter for DSC  
Typical Characteristics (Continued )  
VBAT=3.8V  
VBAT=3.8V  
CH1：CTL1， CH2：VOUT1  
CH3：IOUT1， CH4：Iin  
CH1：CTL2， CH2：VOUT2  
CH3：IOUT2， CH4：Iin  
VBAT=4.2V  
VBAT=3.8V  
CH1：CTL， CH2：VOUT1  
CH3：VOUT2， CH4：VOUT3  
CH2：VOUT1， CH3：IOUT1  
VBAT=3.8V  
VBAT=3.8V  
CH2：VOUT2， CH3：IOUT2  
CH2：VOUT3， CH3：IOUT3  
7F, No.9, Park Avenue II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.  
Tel: 886-3-563-0878  
1/10/2006 REV:1.0  
Fax: 886-3-563-0879  
WWW: http://www.aimtron.com.tw  
Email: service@aimtron.com.tw  
10  
AT1397A/B  
Preliminary Product Information  
6-Channel DC-DC Converter for DSC  
Typical Application Circuits  
VBAT  
1-Cell Li-Ion  
3.4V~4.2V  
LED+  
2~4Cell  
20mA  
10uH  
10uH  
10uF  
10uF  
CCD Bias  
PVCC4  
OUT6  
MBR140WS  
1uF  
PVCC4  
OUT5  
MBR140WS  
+12V/50mA  
CH5  
Voltage-Mode  
PWM LED  
Driver  
UPM2031AN  
UPM2031AN  
CH6  
Voltage-Mode  
Step-Up PWM  
10uF  
150K  
10K  
140K  
FB6  
FB5H  
10K  
0.1uF  
10K  
COMP6  
0.1uF  
1K  
SS6  
COMP5  
FB5  
LED-  
0.1uF  
1uF  
0.22uF  
PVCC3  
PVCC3  
SS5  
10K  
10R  
VBAT  
SEL4  
10uF  
OUT3M  
UPM2032BN  
10uH  
VBAT  
PVCC4  
PVCC4  
VLENS  
CH3  
+3V/300mA  
Voltage-Mode  
Synchronous  
Step-Down  
10uF  
1uF  
OUT3S  
22uF  
UPM2032BN  
CCD Bias  
OUT4  
CH4  
-6V3/50mA  
MBR140WS  
Voltage-Mode  
Inverting PWM  
MBR140WS  
UPM2031AN  
275K  
PGND3  
FB3  
10uF  
/6V3  
0.22uF  
64.9K  
10uH  
SS4  
COMP4  
IN4  
0.1uF  
10K  
COMP3  
SS3  
100K  
10K  
0.1uF  
0.1uF  
10K  
PVCC1  
IP4  
VBAT  
VREG  
10uF  
1uF  
10K  
CH1  
VDSP_Core  
+1V8/200mA  
Current-Mode  
Synchronous  
Step-Down  
PWM  
LX1  
AT1397A  
0.1uF  
6.8uH  
10K  
VBG  
22uF  
PGND1  
MBR140WS  
125K  
100K  
1500pF  
51K  
COMP1  
FB1  
SS1  
0.47uF  
33pF  
CSCP  
CT  
Short-Circuit  
Protection  
0.1uF  
10uF  
PVCC2  
82pF  
51K  
VBAT  
1500pF  
COMP2  
/SDOK  
CH2  
VDSP_IO  
Current-Mode  
Synchronous  
Step-Down  
PWM  
+3V3/200mA  
LX2  
6.8uH  
33pF  
22uF  
PGND2  
MBR140WS  
312.5K  
Power ON  
CTL1  
CTL2  
CTL3  
CTL4  
CTL5  
CTL6  
100K  
FB2  
SS2  
LENS ON  
CCD ON  
LED ON  
0.1uF  
1uF  
VCC  
GND  
VBAT  
1-Li Battery Application 1  
7F, No.9, Park Avenue II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.  
Tel: 886-3-563-0878  
1/10/2006 REV:1.0  
Fax: 886-3-563-0879  
WWW: http://www.aimtron.com.tw  
Email: service@aimtron.com.tw  
11  
AT1397A/B  
Preliminary Product Information  
6-Channel DC-DC Converter for DSC  
Typical Application Circuits ( Continued )  
VBAT  
1-Cell Li-Ion  
3.4V~4.2V  
10uH  
10uH  
10uF  
10uF  
CCD Bias  
PVCC4  
OUT6  
MBR140WS  
10uF  
PVCC4  
OUT5  
MBR140WS  
+12V/50mA  
LCD  
UPM2031AN  
UPM2031AN  
+12V/50mA  
CH5  
CH6  
Voltage-Mode  
Step-Up PWM  
Voltage-Mode  
Step-Up PWM  
10uF  
140K  
FB6  
FB5H  
10K  
0.1uF  
10K  
COMP6  
0.1uF  
1K  
COMP5  
FB5  
140K  
10K  
SS6  
0.1uF  
1uF  
0.1uF  
SS5  
PVCC3  
PVCC3  
VBAT  
SEL4  
10uF  
OUT3M  
UPM2032BN  
10uH  
VBAT  
PVCC4  
PVCC4  
VLENS  
CH3  
+3V/300mA  
Voltage-Mode  
Synchronous  
Step-Down  
10uF  
1uF  
OUT3S  
22uF  
UPM2032BN  
CCD Bias  
OUT4  
CH4  
-6V3/50mA  
MBR140WS  
Voltage-Mode  
Inverting PWM  
MBR140WS  
UPM2031AN  
275K  
PGND3  
FB3  
10uF  
/6V3  
0.22uF  
64.9K  
10uH  
SS4  
COMP4  
IN4  
0.1uF  
10K  
COMP3  
SS3  
100K  
10K  
0.1uF  
0.1uF  
10K  
PVCC1  
IP4  
VBAT  
VREG  
10uF  
1uF  
CH1  
VDSP_Core  
+1V8/200mA  
10K  
Current-Mode  
Synchronous  
Step-Down  
PWM  
LX1  
AT1397B  
0.1uF  
6.8uH  
10K  
VBG  
22uF  
PGND1  
MBR140WS  
125K  
100K  
1500pF  
51K  
COMP1  
FB1  
SS1  
0.47uF  
33pF  
CSCP  
CT  
Short-Circuit  
Protection  
0.1uF  
10uF  
PVCC2  
82pF  
51K  
VBAT  
1500pF  
COMP2  
/SDOK  
CH2  
VDSP_IO  
Current-Mode  
Synchronous  
Step-Down  
PWM  
+3V3/200mA  
LX2  
6.8uH  
33pF  
22uF  
PGND2  
MBR140WS  
312.5K  
Power ON  
CTL1  
CTL2  
CTL3  
CTL4  
CTL5  
CTL6  
100K  
FB2  
SS2  
LENS ON  
CCD ON  
LED ON  
0.1uF  
1uF  
VCC  
GND  
VBAT  
1- Li Battery Application 2  
7F, No.9, Park Avenue II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.  
Tel: 886-3-563-0878  
1/10/2006 REV:1.0  
Fax: 886-3-563-0879  
WWW: http://www.aimtron.com.tw  
Email: service@aimtron.com.tw  
12  
AT1397A/B  
Preliminary Product Information  
6-Channel DC-DC Converter for DSC  
Application Information  
The AT1397A/B includ 6 channels DC/DC to generate a multiple-output digital  
camera power-supply system. It include :  
z
z
z
z
z
Step-Down DC/DC converter with on-chip synchronous MOSFETs.(CH1, CH2)  
Main synchronous DC/DC controller for Step-Down converter.(CH3)  
Selectable DC/DC controller for boost/flyback/buck/inverting converters.(CH4)  
White LED driver with open LED protection or boost controller.(CH5)  
Boost/flyback controller.(CH6)  
Step-Down DC/DC Converter (CH1, CH2)  
The step-down DC/DC is optimized for generating DSP voltage (down to 0.8V) at  
high efficiency. It runs from the voltage at PVCC1/PVCC2. This pin can be connected  
directly to the battery if sufficient headroom exists to avoid dropout.  
The CH2 also features an open-drain /SDOK output that goes low when the CH2 is in  
regulation. /SDOK may be used to drive an external P-MOSFET that gates 3V power  
to the LENs after the DSP_IO voltage is in regulation (Figure 1). The R1,R2 and C1  
is for MOSFET soft-start function to avoid the more inrush current .  
Step-Down DC/DC Converter (CH3)  
The CH3 is step-down voltage mode PWM converter. An external MOSFET and  
synchronous rectifier allow conversion efficiencies as high as 93%. Step-down  
operation can be direct from Li-Ion cell if the minimum input voltage exceeds the  
desired output by approximately 200mV.  
7F, No.9, Park Avenue II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.  
Tel: 886-3-563-0878  
Fax: 886-3-563-0879  
WWW: http://www.aimtron.com.tw  
Email: service@aimtron.com.tw  
1/10/2006  
REV:1.0  
13  
AT1397A/B  
Preliminary Product Information  
6-Channel DC-DC Converter for DSC  
PVCC3  
OUT3M  
OUT3S  
VBAT  
VBG  
VLENS  
+3V  
CH3  
VBAT  
Voltage-Mode  
Synchronous  
Step-Down  
VCC  
GND  
C1  
R1  
PGND3  
FB3  
R2  
COMP3  
SS3  
PVCC1  
VBAT  
COMP1  
CH1  
LX1  
VDSP_Core  
+1V8  
Current-Mode  
Synchronous  
Step-Down  
PWM  
PGND1  
FB1  
SS1  
PVCC2  
VBAT  
CH2  
VDSP_IO  
+3V3  
Current-Mode  
Synchronous  
Step-Down  
PWM  
LX2  
COMP2  
PGND2  
FB2  
SS2  
/SDOK  
Figure 1. Using /SDOK to drive external P-MOSFET that gates 3V power to LENs after 3.3V I/O voltage is in regulation  
7F, No.9, Park Avenue II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.  
Tel: 886-3-563-0878  
Fax: 886-3-563-0879  
WWW: http://www.aimtron.com.tw  
Email: service@aimtron.com.tw  
1/10/2006  
REV:1.0  
14  
AT1397A/B  
Preliminary Product Information  
6-Channel DC-DC Converter for DSC  
Auxiliary Controller (CH4, CH5, CH6)  
The three auxiliary controllers operate as fixed-frequency voltage-mode PWM  
controllers. They use the external MOSFETs, so output power is determined by  
external components. All of auxiliary controllers have a guaranteed duty cycle of  
maximum duty cycle of 85% (boost-type) or 100%(buck/inverting type). In boost  
designs that employ continuous current (CCM), the maximum duty cycle limits the  
boost ratio so:  
VIN  
VOUT  
1−  
≤ 85%  
With discontinuous inductor current (DCM), no such limit exists for the input/output  
ratio since the inductor has time to fully discharge before the next cycle begins. The  
discontinuous conduction mode boost voltage conversion relationship is given by:  
4 × D2  
1+ 1+  
K
D = K × M × (M − 1)  
VO = Vi ×  
2
Where K is defined as:  
VO  
M =  
Vi  
2 × L  
K =  
R ×TS  
The CH4 is selectable DC/DC controller for drive N-channel MOSFETs (SEL=high)  
or P-channel MOSFETs (SEL=low). It can be configure as the inverting circuit  
(Figure 2), typically for CCD and LCD bias. This is useful in height-limited designs  
where transformers may not be desired. The efficiency is more than the charge-pump  
inversion for some load conditions.  
The CH5 can be configure as a switching-mode boost current source for white LEDs,  
FB5 (0.2V) provides current-sensing feedback, while FB5H (1.0V) provides (optional)  
open-LED over-voltage protection (Figure 3). If used as a boost converter, FB5H is  
grounded and FB5 (0.8V) is used as the feedback input. In this case, CH5 behaves  
exactly like CH4 and CH6.  
The CH6 can be used for conventional DC/DC boost and flyback designs.(Figure  
4 ,Figure 5 and Figure 6)  
7F, No.9, Park Avenue II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.  
Tel: 886-3-563-0878  
Fax: 886-3-563-0879  
WWW: http://www.aimtron.com.tw  
Email: service@aimtron.com.tw  
1/10/2006  
REV:1.0  
15  
AT1397A/B  
Preliminary Product Information  
6-Channel DC-DC Converter for DSC  
VBAT  
SEL4  
PVCC4  
-7.5V  
CCD Bias  
OUT4  
CH4  
Voltage-Mode  
Inverting PWM  
SS4  
COMP4  
IN4  
IP4  
VREG  
Figure 2. Regulated –7.5V negative CCD Bias.  
VBAT  
LED+  
2~4Cell  
20mA  
PVCC4  
OUT5  
CH5  
Voltage-Mode  
PWM LED Driver  
FB5H  
COMP5  
LED-  
FB5  
SS5  
Figure 3. LED Drive with open LED over-voltage protection  
7F, No.9, Park Avenue II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.  
Tel: 886-3-563-0878  
1/10/2006 REV:1.0  
Fax: 886-3-563-0879  
WWW: http://www.aimtron.com.tw  
Email: service@aimtron.com.tw  
16  
AT1397A/B  
Preliminary Product Information  
6-Channel DC-DC Converter for DSC  
VBAT  
-7.5V  
15V  
PVCC4  
OUT6  
CH6  
Voltage-Mode  
Step-Up PWM  
FB6  
COMP6  
SS6  
Figure 4. +15V and –7.5V CCD Bias with transformer  
VBAT  
-7.5V  
PVCC4  
OUT6  
15V  
CH6  
Voltage-Mode  
Step-Up PWM  
FB6  
COMP6  
SS6  
Figure 5. +15V and –7.5V CCD Bias with Charge-Pump Inversion  
7F, No.9, Park Avenue II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.  
Tel: 886-3-563-0878  
1/10/2006 REV:1.0  
Fax: 886-3-563-0879  
WWW: http://www.aimtron.com.tw  
Email: service@aimtron.com.tw  
17  
AT1397A/B  
Preliminary Product Information  
6-Channel DC-DC Converter for DSC  
VBAT  
15V  
PVCC4  
CH6  
OUT6  
Voltage-Mode  
Step-Up PWM  
FB6  
COMP6  
SS6  
IN  
/SHDN GND  
FB  
OUT  
+
-
1.24V  
AT1202  
Figure 6. +15V and –7.5V CCD Bias with Charge-Pump (using AT1202 to regulated the negative output)  
Soft-Start Setting (CH1~CH6)  
The AT1397A/B all channels feature a soft-start function that limits inrush current and  
prevents excessive battery loading at start-up by ramping the output voltage of each  
channel up to the regulation voltage. However that CH2 to CH6 start until the CH1  
reaches regulation. Consider the input voltage and load current to design the capacitor  
connected to the SS pin. It can calculate the CH1~6 soft start time Ts(s)(valid  
threshold 0.3~0.8V interval).  
∆V  
∆t  
C ×  
= I  
Ts(s) = 0.5× C(µF)  
Note : It could be disabled soft start function by floating SS pin.  
7F, No.9, Park Avenue II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.  
Tel: 886-3-563-0878  
Fax: 886-3-563-0879  
WWW: http://www.aimtron.com.tw  
Email: service@aimtron.com.tw  
1/10/2006  
REV:1.0  
18  
AT1397A/B  
Preliminary Product Information  
6-Channel DC-DC Converter for DSC  
SCP Protection Setting (CH3~CH6)  
The CSCP comparator detects CH3, CH4, CH5 and CH6 output voltage while the  
power converter work at normal condition. At the same time, the voltage level of  
CSCP pin is held at low level. If the output load of these converters rapidly  
malfunction or short, causing the output voltage to drop, the CSCP comparator detects  
that to enable short circuit protection. The time period when short circuit protection  
show as follow equation.  
Short detection time (TPE(s))  
TPE(s) = 0.9 * CCSCP (µF)  
Note : It could be disabled short circuit protection function by connecting CSCP pin  
into the ground.  
Determine the triangular Oscillator Frequency  
The triangular oscillator frequency is determined by the timing capacitor (CT). It is  
difficult to incorporate these non-linear characteristics into the equation. This  
difference is caused by characteristics, such as changes in the maximum voltage  
amplitude of the sawtooth waveform with the CT value and the circuit delay causing  
the maximum amplitude to become large in the case of a high oscillating frequency  
even for the same capacitor. In practical use, therefore, the user should read the CT  
values from the characteristic curve or should determine an approximate target value  
by using the equation.  
41000  
CT ( pF)  
f
OSC (KHz) =  
7F, No.9, Park Avenue II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.  
Tel: 886-3-563-0878  
1/10/2006 REV:1.0  
Fax: 886-3-563-0879  
WWW: http://www.aimtron.com.tw  
Email: service@aimtron.com.tw  
19  
AT1397A/B  
Preliminary Product Information  
6-Channel DC-DC Converter for DSC  
Package Outline: QFN48  
7F, No.9, Park Avenue II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.  
Tel: 886-3-563-0878  
1/10/2006 REV:1.0  
Fax: 886-3-563-0879  
WWW: http://www.aimtron.com.tw  
Email: service@aimtron.com.tw  
20  
AT1397A/B  
Preliminary Product Information  
6-Channel DC-DC Converter for DSC  
Reflow Profiles  
Sn-Pb Eutectic Assembly  
Pb-Free Assembly  
Large Body  
Pkg. thickness  
≥2.5mm or Pkg.  
volume ≥350mm3  
Large Body  
Small Body  
Pkg. thickness  
≥2.5mm or Pkg.  
Small Body  
Pkg. thickness  
<2.5mm or Pkg.  
volume <350mm3  
Profile Feature  
Pkg. thickness  
≥2.5mm or Pkg.  
volume ≥350mm3 volume ≥350mm3  
3°C/second max.  
Average ramp-up rate  
3°C/second max.  
(T to T )  
L
P
Preheat  
-Temperature Min(Tsmin)  
-Temperature Max (Tsmax)  
-Time (min to max)(ts)  
100°C  
150°C  
150°C  
200°C  
60-120 seconds  
60-180 seconds  
Tsmax to T  
L
-
3°C/second max.  
-Ramp-up Rate  
Time maintained above:  
-Temperature (T )  
L
183°C  
217°C  
-Time (t )  
L
60-150 seconds  
60-150 seconds  
Peak Temperature(T )  
P
225+0/-5°C  
240+0/-5°C  
245+0/-5°C  
250+0/-5°C  
Time within 5°C of actual  
10-30 seconds  
10-30 seconds  
10-30 seconds  
20-40 seconds  
Peak Temperature (t )  
P
Ramp-down Rate  
6°C/second max.  
6 minutes max.  
3°C/second max.  
8 minutes max.  
Time  
25°C  
to  
Peak  
Temperature  
*All temperatures refer to topside of the package, measured on the package body surface.  
7F, No.9, Park Avenue II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.  
Tel: 886-3-563-0878  
Fax: 886-3-563-0879  
WWW: http://www.aimtron.com.tw  
Email: service@aimtron.com.tw  
1/10/2006  
REV:1.0  
21  

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