FP5452RR-LF [FEELING]
Dual PWM Controller With SCP / DTC Function;
| 型号： | FP5452RR-LF |
| 厂家： | 
Feeling Technology |
| 描述： | Dual PWM Controller With SCP / DTC Function |
| 文件： | 总21页 (文件大小：520K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
FP5452
Dual PWM Controller With SCP / DTC Function
General Description
The FP5452 is a dual channel PWM buck controller with short circuit protection (SCP) and
adjustable maximum duty control (DTC) function. It includes one 2.5V precision voltage reference
regulator, two error amplifiers, PWM control circuits, totem-pole output stages and the under voltage
lockout circuit (UVLO). It offers space and low cost solutions in many applications such as the DC / DC
converters and backlight inverters.
Using FP5452, it is easy to complete a power conversion regulator design with few external
components. The circuit diagram of the typical application example is as below.
Features
Wide Operating Voltage range: 3.6~40V
Fixed Reference Voltage: 2.5V
Reference Voltage Precision: 2%
Oscillator Frequency: Max. 500KHz
Totem-pole Output stage
Low Quiescent Supply Current Under 3.5mA
Variable dead-time Control (DTC)
UVLO Protection Function
SCP Protection Function (Threshold Voltage: 1.3V)
Package: SOP-16L / SSOP-16L
Applications
DC / DC Converters for Video Camera
TFT LCD Monitor
Back Light CCFL Inverter
This datasheet contains new product information. Feeling Technology reserves the rights to modify the product specification without notice.
No liability is assumed as a result of the use of this product. No rights under any patent accompany the sales of the product.
Website: http://www.feeling-tech.com.tw
Rev. 1.0
1/21
FP5452
Function Block Diagram
VCC
RT
CT
DCT2
FB2
EA2+
OUT2
EA2-
Oscillator
PWM
COMP
1/2 Vref
Reference
Voltage
VREF
SCP
R
S
UVLO
R
Iscp
EA1+
EA1-
FB1
OUT1
PWM
COMP
DTC1
GND
This datasheet contains new product information. Feeling Technology reserves the rights to modify the product specification without notice.
No liability is assumed as a result of the use of this product. No rights under any patent accompany the sales of the product.
Website: http://www.feeling-tech.com.tw
Rev. 1.0
2/21
FP5452
Pin Descriptions
SOP-16L
Name No. I / O
Description
Top View
Connect a Capacitor for Oscillator Frequency
Adjustment
Connect a Resistor for Oscillator Frequency
Adjustment
CT
RT
1
2
I
I
1
16
15
14
13
12
11
10
9
CT
VREF
SCP
2
RT
EA1+
EA1-
FB1
3
4
I
I
Output 1 Error Amplifier Non-inverting Input
Output 1 Error Amplifier Inverting Input
Output 1 Error Amplifier Output
Output 1 Maximum Duty Control Voltage
Output 1 Totem-pole Output
3
EA1+
EA2+
EA2-
FB2
4
EA1-
5
O
I
5
6
DTC1
OUT1
GND
VCC
6
FB1
DTC1
OUT1
GND
7
O
P
P
O
I
DTC2
OUT2
VCC
8
IC Ground
7
8
9
IC Power Supply
OUT2
DTC2
FB2
10
11
12
13
14
Output 2 Totem-pole Output
Output 2 Maximum Duty Control Voltage
Output 2 Error Amplifier Output
Output 2 Error Amplifier Inverting Input
Output 2 Error Amplifier Non-inverting Input
O
I
EA2-
EA2+
I
SSOP-16L
Connect a Capacitor to Set Short Circuit
Protection Timing
SCP
VREF
15
16
I
Top View
O
2.5V Reference Voltage Output
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
This datasheet contains new product information. Feeling Technology reserves the rights to modify the product specification without notice.
No liability is assumed as a result of the use of this product. No rights under any patent accompany the sales of the product.
Website: http://www.feeling-tech.com.tw
Rev. 1.0
3/21
FP5452
Marking Information
SOP-16L
FP5452
9Fa-86L
Halogen Free
Lot Number
Internal ID
Per-Half Month
Year
SSOP-16L
FP5452
9Fa-86L
Halogen Free
Lot Number
Internal ID
Per-Half Month
Year
Halogen Free: Halogen free product indicator
Lot Number: Wafer lot number’s last two digits
For Example: 132386TB 86
Internal ID: Internal Identification Code
Per-Half Month: Production period indicated in half month time unit
For Example: January → A(Front Half Month), B (Last Half Month)
February → C(Front Half Month), D(Last Half Month)
Year: Production year’s last digit
This datasheet contains new product information. Feeling Technology reserves the rights to modify the product specification without notice.
No liability is assumed as a result of the use of this product. No rights under any patent accompany the sales of the product.
Website: http://www.feeling-tech.com.tw
Rev. 1.0
4/21
FP5452
Ordering Information
Part Number
Operating Temperature
Package
SOP-16L
SSOP-16L
MOQ
Description
Tape & Reel
Tape & Reel
FP5452DR-LF
FP5452RR-LF
2500 EA
2500 EA
-20°C ~ +85°C
-20°C ~ +85°C
Absolute Maximum Ratings
Parameter
Symbol Conditions
Min.
Typ.
Max.
40
Unit
V
Power Supply Voltage
VCC
VID
IO
Differential Input Voltage
Output Sink Current
20
V
150
+150
+90
+110
+45
+55
830
570
+150
mA
Maximum Junction Temperature
TJ
℃
SOP-16L
SSOP-16L
SOP-16L
SSOP-16L
℃ / W
℃ / W
℃ / W
℃ / W
mW
mW
Thermal Resistance Junction to
Ambient
θJA
θJC
PD
Thermal Resistance Junction to
Case
SOP-16L, TA= +25℃
SSOP-16L, TA= +25℃
Power Dissipation
Storage Temperature
Lead Temperature, (soldering, 10
sec)
-65
℃
+260
℃
Suggested IR Re-flow Soldering Curve
This datasheet contains new product information. Feeling Technology reserves the rights to modify the product specification without notice.
No liability is assumed as a result of the use of this product. No rights under any patent accompany the sales of the product.
Website: http://www.feeling-tech.com.tw
Rev. 1.0
5/21
FP5452
Recommended Operating Conditions
Parameter
Symbol
Conditions
Min.
3.6
Typ.
Max.
40
Unit
Supply Voltage
Operating Temperature
V
-20
+85
℃
DC Electrical Characteristics (VCC= 6V, f=200kHz, unless otherwise noted)
Parameter
Reference Section
Output Voltage (pin16)
Symbol
Test Conditions
Min.
Typ.
Max.
Unit
VREF IO=1mA
TA=-20℃ to 25℃
2.45
2.5
2.55
±1%
±1%
V
-0.1%
-0.2%
Output Voltage Change with
Temperature
TA=25℃ to 85℃
VCC=3.6V～40V
△VREF
VREF
△VREF
VREF
/
/
Input Voltage Regulation
Output Voltage Regulation
2
12.5
mV
Io = 0.1mA to 1 mA
1
7.5
30
mV
mA
Short-Circuit Output Current
ISHORT VO=0
3
10
Under Voltage Lockout Section
Upper Threshold Voltage (VCC
Lower Threshold Voltage (VCC
)
)
VUPPER
2.72
2.6
V
V
I
O (REF) = 0.1 mA,
VLOW
VHYS
TA=25℃
Hysteresis (VCC
)
80
120
1.3
mV
V
Reset Threshold Voltage (VCC
)
VRESET
1.0
Short-Circuit Protection Control Section
Input Threshold Voltage (SCP)
Standby Voltage (SCP)
VTH
1.2
60
1.3
80
1.5
100
60
V
TA= 25℃
VSTANDBY No pullup
VLATCH No pullup
mV
mV
μA
Latched Input Voltage (SCP)
Input (Source) Current
40
ISOURCE
-1.
-2.0
-2.5
VI=0.7V, TA=25℃
Comparator Threshold Voltage
(Feedback)
VCOMP (TH)
1.20
V
Oscillator Section
Frequency
f
CT=330pF, RT=10K
CT=330pF, RT=10K
220
10
KHZ
%
Standard Deviation of Frequency
Frequency Change with Voltage
△f
△f / △V VCC=3.6V to 40V
1
%
-2
-2
-0.4
-0.2
+2
+2
%
TA=-20℃ to 25℃
△f / △T
Frequency Change with
Temperature
%
TA=25℃ to 85℃
Duty Control Section
Input Bias Current (DTC)
IBIAS
1
μA
μA
Latch Mode (Source) Current
(DTC)
ISOURCE
-80
2.2
-260
TA=25℃
VLATCH IO=40μA
Zero Duty Cycle
Maximum Duty Cycle
Latched Input Voltage (DTC)
2.3
V
V
V
2.05
1.35
2.25
Input Threshold Voltage at
f=10kHZ (DTC)
VTH
1.2
This datasheet contains new product information. Feeling Technology reserves the rights to modify the product specification without notice.
No liability is assumed as a result of the use of this product. No rights under any patent accompany the sales of the product.
Website: http://www.feeling-tech.com.tw
Rev. 1.0
6/21
FP5452
Parameter
Error Amplifier Section
Input Offset Voltage
Input Offset Current
Input Bias Current
Symbol
Test Conditions
Min.
Typ.
Max.
Unit
VIO
IIO
Vo (Feedback)=1.25V
Vo (Feedback)=1.25V
Vo (Feedback)=1.25V
-6
+6
+100
500
mV
nA
nA
-100
IBIAS
160
Common-mode Input Voltage
Range
VICM VCC=3.6V to 40 V
0.3
70
1.6
V
Open-Loop Voltage Gain
AVO
BW
80
1.5
80
dB
MHZ
dB
V
RF=200KΩ
Unity Gain Bandwidth
Common Mode Rejection Ratio
Positive Output Voltage Swing
Negative Output Voltage Swing
Output (Sink) Current (Feedback)
CMRR
VPOS
VNEG
ISINK
60
VREF-0.3
1
V
VID= -0.1V, VO=1.25V
1
4.0
-90
mA
Output (Source) Current
(Feedback)
ISOURCE VID=0.1V, VO=1.25V
-45
μA
Output Section
ISINK=20mA
VOL
0.8
1.2
4.5
13.2
60
1.2
1.8
V
V
VOUT Low Voltage
I
SINK =130mA, Vcc=15V
ISOURCE=20mA
SOURCE=130mA, Vcc=15V
4.0
V
VOUT High Voltage
VOH
I
12.7
V
Rise Time
tR
tF
120
60
nS
nS
TJ=25℃, CL=1nF
TJ=25℃, CL=1nF
Fall Time
30
PWM Comparator Section
Zero Duty Cycle
2.05
1.35
2.25
V
V
Input Threshold Voltage at
f=10kHz (Feedback)
VTH
Maximum Duty Cycle
1.2
Total Device
Standby Supply Current
Average Supply Current
ISTANDBY Off-State
IAVE RT=10K
2.2
2.7
3.3
3.8
mA
mA
This datasheet contains new product information. Feeling Technology reserves the rights to modify the product specification without notice.
No liability is assumed as a result of the use of this product. No rights under any patent accompany the sales of the product.
Website: http://www.feeling-tech.com.tw
Rev. 1.0
7/21
FP5452
Typical Operating Characteristics
(VCC=5V, TA= 25°C, unless otherwise noted)
TRIANGLE OSCILLATOR FREQUENCY
OSCILLATOR FREQUENCY VARIATION
VS
TIMING RESISTANCE
1 M
VS
FREE-AIR TEMPERATURE
3
2
Vcc = 5 V
T
A
= 330pF
= 25o
C
C
T
R
= 10 KΩ
T
C
C
fosc = 200kHz
= 100 pF
T
T
100 K
10 K
1 K
1
0
= 1000 pF
-1
-2
-3
C
= 10000 pF
T
1 K
4 K 10 K
40 K 100 K
400 K
1 M
-25
0
25
50
75
100
RT - Timing Resistance -
Figure 1
TA - Free-Air Temperature -o
C
Figure 2
TRIANGLE WAVEFORM SWING VOLTAGE
TRIANGLE WAVEFORM PERIOD
VS
VS
TIMING CAPACITANCE
TIMING CAPACITANCE
102
101
100
10-1
2.6
2.4
2.2
2
Vcc = 5 V
= 25o
Vcc = 5 V
= 25o
C
= 5.1 KΩ
T
C
A
T
A
R
= 5.1KΩ
T
R
T
1.8
1.6
1.4
1.2
1
0.8
101
102
103
104
105
101
102
103
104
105
CT - Timing Capacitance - pF
Figure 3
CT - Timing Capacitance - pF
Figure 4
REFERENCE OUTPUT VOLTAGE VARIATION
REFERENCE OUTPUT VOLTAGE VARIATION
VS
VS
FREE-AIR TEMPERATURE
FREE-AIR TEMPERATURE
30
30
Vcc = 3.6 V
= 1mA
Vcc = 40 V
= 1mA
I
I
(ref)
(ref)
20
10
0
20
10
0
-10
-20
-30
-10
-20
-30
-25
0
25
50
75
100
-25
0
25
50
75
100
TA - Free-Air Temperature -o
TA - Free-Air Temperature -o
C
C
Figure 5
Figure 6
This datasheet contains new product information. Feeling Technology reserves the rights to modify the product specification without notice.
No liability is assumed as a result of the use of this product. No rights under any patent accompany the sales of the product.
Website: http://www.feeling-tech.com.tw
Rev. 1.0
8/21
FP5452
REFERENCE OUTPUT VOLTAGE
UNDERVOLTAGE LOCKOUT
CHARACTERISTIC
VS
SUPPLY VOLTAGE
3.5
3.25
3
600
500
400
3
2.5
2
T
A
= 25o
C
Threshold Voltage - V
TH
(Left Scale)
Threshold Voltage - V
(Left Scale)
TL
300
200
100
50
2.75
2.5
2.25
2
1.5
1
0.5
0
Hysteresis Voltage
(Right Scale)
-25
0
25
50
75
100
0
5
10
15
20
25
30
35
40
o
TA - Free-Air Temperature -
C
Vcc - Supply Voltage - V
Figure 8
Figure 7
SHORT-CIRCUIT PROTECTION
CHARACTERISTICS
UNDERVOLTAGE LOCKOUT
HYSTERESIS CHARACTERISTICS
6
T
A
oC
= 25
= 85o
C
T
A
= -20o
C
T
A
1.40
1.30
1.20
1.10
1.00
3
Short-Circuit Protection
Comparator Threshold Voltage
(Left Scale)
5
4
3
2
1
0
2.5
2
Short-Circuit Protection
Latch Reset Supply Voltage
(Right Scale)
1.5
1
-25
0
25
50
75
C
100
0
1
2
3
4
5
o
TA - Free-Air Temperature -
Vcc - Supply Voltage - V
Figure 10
Figure 9
ERROR AMP MAXIMUM OUTPUT
VOLTAGE SWING
VS
FREQUENCY
2.5
2.25
2
Vcc = 5 V
T
= 25o
C
A
1.75
1.5
1.25
1
0.75
0.5
0.25
1K
10K
100K
1M
10M
f - Frequescy - Hz
Figure 11
This datasheet contains new product information. Feeling Technology reserves the rights to modify the product specification without notice.
No liability is assumed as a result of the use of this product. No rights under any patent accompany the sales of the product.
Website: http://www.feeling-tech.com.tw
Rev. 1.0
9/21
FP5452
PROTECTION ENABLE TIME
VS
PROTECTION ENABLE CAPACITANCE
70
60
50
40
30
20
0
90
0
10
30
50
70
CPE - Protection Enable Capacitance - uF
SCP
15
Vref
Isc
p
Vref
R
Vref
Short - Circuit
Protection
12 KΩ
S
Protectio
n
Comparator
C
PE
U.V.L.O
Latch
ERROR AMP 1
ERROR AMP 2
1.25 V
Figure 12
This datasheet contains new product information. Feeling Technology reserves the rights to modify the product specification without notice.
No liability is assumed as a result of the use of this product. No rights under any patent accompany the sales of the product.
Website: http://www.feeling-tech.com.tw
Rev. 1.0
10/21
FP5452
OUTPUT TRANSISTOR ON DUTY CYCLE
STANDBY CURRENT
VS
VS
DEAD - TIME INPUT VOLTAGE
SUPPLY VOLTAGE
0
T
A
= 25 o
C
Vcc = 3.6 V
10
4.5
C
= 330pF
= 10 KO
T
T
R
20
30
4
3.5
3
40
50
60
2.5
2
70
1.5
1
80
90
0
100
0
0.5
1
1.5
2
2.5
3
3.5
4
0
10
20
30
40
Vcc - Supply Voltage - V
Dead - Time Input Voltage - V
Figure 14
Figure 13
GAIN (AMPLIFIER IN UNITY-GAIN
STANDBY CURRENT
CONFIGURATION)
VS
VS
FREE - AIR TEMPERATURE
FREQUENCY
10
5
Vcc = 5 V
= 25 o
5
T
A
C
Average Supply Current
Vcc = 6 V
= 10 KO
C = 330pF
T
4.5
R
T
4
0
3.5
3
Standby Current
Vcc = 40 V, No Load
- 5
2.5
- 10
- 15
- 20
2
Standby Current
Vcc = 3.6 V, No Load
1.5
1
10K
-25
0
25
50
75
100
1K
100K
1M
10M
TA - Free-Air Temperature - o
C
f - Frequescy - Hz
Figure 16
Figure 15
This datasheet contains new product information. Feeling Technology reserves the rights to modify the product specification without notice.
No liability is assumed as a result of the use of this product. No rights under any patent accompany the sales of the product.
Website: http://www.feeling-tech.com.tw
Rev. 1.0
11/21
FP5452
Timing Waveform
Oscillator Triangle Waveform
Error Amplifier Output
Dead-Time Input Voltage
Short-Circuit Protection
Comparator Input Voltage
2.0 V
1.6 V
1.4 V
1.25 V
H
L
PWM Comparator Output Voltage
Dead Time 100%
Output Transistor Collector
Waveform
H
L
1.3 V
0 V
Protection Enable
Terminal Waveform
tpe
Short-Circuit Protection
Comparator Output
H
L
3.6 V
0 V
2.8 V TYP
Power Supply Voltage
Protection Enable Time, tpe = (0.658 * 10E6 * Cpe) in seconds
Figure 17 FP5452 CH1 / CH2 Timing Diagram
This datasheet contains new product information. Feeling Technology reserves the rights to modify the product specification without notice.
No liability is assumed as a result of the use of this product. No rights under any patent accompany the sales of the product.
Website: http://www.feeling-tech.com.tw
Rev. 1.0
12/21
FP5452
Function Description
Voltage Reference
FP5452 has an internal 2.5V reference regulator for its internal circuits’ voltage bias. This
reference voltage is also divided down by a resistive divider to provide error amplifiers as the inverting
input reference voltage. (Figure 18)
Figure 18 Error Amplifiers and Reference with Resistive Dividers
The error amplifier inverting input (EA1- or EA2-) reference voltage equations are shown as
following:
R2
VEA1 VREF(2.5V)
R1 R2
R4
VEA2 VREF(2.5V)
R3 R4
This datasheet contains new product information. Feeling Technology reserves the rights to modify the product specification without notice.
No liability is assumed as a result of the use of this product. No rights under any patent accompany the sales of the product.
Website: http://www.feeling-tech.com.tw
Rev. 1.0
13/21
FP5452
Error Amplifier
The error amplifiers of FP5452 compare the feedback voltage from the resistive dividers of
DC-DC converter output to the reference voltage (see Figure 19). They generate the error signal for
the PWM comparator.
Figure 19 Error Amplifier with Feedback / Compensation Circuits
The Buck Converter Output Voltage:
R5
R6
R2
VOUT 1
2.5V
R1 R2
Error Amplifier Gain:
Av 1
1 sR7C1
sRi(C1 C2)(1 sR7C2)
,Ri=R1//R2
Error Amplifier Zero and Pole Frequency:
1
1
Fz
Fp
,
2R7C1
2R7C2
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No liability is assumed as a result of the use of this product. No rights under any patent accompany the sales of the product.
Website: http://www.feeling-tech.com.tw
Rev. 1.0
14/21
FP5452
Oscillator / PWM Comparator
The oscillator frequency can be adjusted from 20KHz to 500KHz by the resistor (RT) and
capacitor (CT) that are connected to pin1 and pin2 respectively. A sawtooth waveform would be
compared with the error amplifier output signal and duty control voltage. Figure 20 shows the
relationship of oscillator, error amplifier and PWM comparator. Figure 21 is their waveforms.
Figure 20 Oscillator / PWM Comparator with Frequency RC Circuits
Figure 21 FP5452 Timing Waveforms
This datasheet contains new product information. Feeling Technology reserves the rights to modify the product specification without notice.
No liability is assumed as a result of the use of this product. No rights under any patent accompany the sales of the product.
Website: http://www.feeling-tech.com.tw
Rev. 1.0
15/21
FP5452
The relationship of oscillator waveform and duty voltage is shown below (Figure 22).
Pin1 Voltage
DTC(zero)
Time
T
DTC(max.)
Figure 22 Oscillator Frequency and DTC voltage
The oscillator frequency calculation equation is shown as below:
VT
f
2 CTRT
Vzero Vmax.
This datasheet contains new product information. Feeling Technology reserves the rights to modify the product specification without notice.
No liability is assumed as a result of the use of this product. No rights under any patent accompany the sales of the product.
Website: http://www.feeling-tech.com.tw
Rev. 1.0
16/21
FP5452
Duty Control / Soft-Start
The duty control (DTC) is a function for the PWM duty cycle limitation. If the DTC voltage is lower
than DTC maximum voltage (1.35V typically), the PWM duty cycle can be as large as 100% cycle. If
the DTC voltage is higher than DTC zero voltage (2.05V typically), the PWM duty cycle will always be
turned-off (zero duty).
ic
Figure 23 DTC Soft-start RC Circuit and Waveform
The soft-start time equation:
t 0.616 R8C3
This datasheet contains new product information. Feeling Technology reserves the rights to modify the product specification without notice.
No liability is assumed as a result of the use of this product. No rights under any patent accompany the sales of the product.
Website: http://www.feeling-tech.com.tw
Rev. 1.0
17/21
FP5452
Short Circuit Protection
FP5452 has a protection function when short circuit is happened. When the DC-DC converter
output voltage is drop to a very low voltage, the error amplifier IN+ pin would also have a low feedback
voltage. The error amplifier will pull its output to a low voltage state. This output voltage is compared
with a 1.25V reference by the SCP comparator. The SCP comparator then turns off transistor Q1 and
SCP capacitor is charged up. When SCP voltage is higher than a threshold voltage (1.3V typically),
this SCP state is latched. The DTC pins are charged up to disable PWM output (zero duty) and the
SCP pin voltage is discharged by Q2 transistor.
Once SCP state is latched, the controller no longer output PWM control pulses. It can only be
reset by reducing the input power supply voltage to below UVLO trigger point (2.6V) (see Figure 24).
Figure 24 Internal SCP Detection / Control Circuits
Pin15 Voltage
VTH(SCP)
VSTANDB
VLATC
t
Time
Figure 25 SCP Waveform (SCP active)
The SCP time equation is:
CSCP
Vth(scp) Vsb
t
Isource
This datasheet contains new product information. Feeling Technology reserves the rights to modify the product specification without notice.
No liability is assumed as a result of the use of this product. No rights under any patent accompany the sales of the product.
Website: http://www.feeling-tech.com.tw
Rev. 1.0
18/21
FP5452
Application Information
Vin
JP1
C1 330pF
R2 33k 1%
CT
REF
R1
C2 0.1uF
RT
SCP
2IN+
2IN-
2FB
33k 1%
R3 10k
1IN+
1IN-
1FB
C3
100uF
C5
C17
100uF
C4
R7
IC2
L2 20uH
C6
R6
33k 1%
Vout1
9435
1DTC 2DTC
1OUT 2OUT
C7 0.027uF
R8 33k
33k
0.027uF
R11
10k 1%
R10
R12
0
GND
VCC
D1
SCD34
C10
220uF/16V
FP5452
C9
R13
3.3k 1%
P1
Vin
R15
C12
R16
R14
C11
2
1
33k 1%
POWER IN
P2
R19
10k
R20
10k
C13
100uF
L3 20uH
+5V
IC3
2
1
Vout2
9435
1DTC
2DTC
OUTPUT #1
P3
R24
2k 1%
R23
+3.3V
2
2
R26
0
D2
SCD34
C15
C16
220uF/16V
R17
R18
R27
1.21k 1%
2
1
OUTPUT #2
Figure 26 FP5452 2-channel Buck Regulators Application Circuits
Note:
1. The IN1- and IN2- voltage is 1.25V, half of VREF voltage, because R1=R6 and R2=R16.
2. The R14-R19-C11 and R15-R20-C12 are DTC circuits for Buck Regulators power-on.
3. The R11-R13 and R24-R27 are the buck regulator output voltage feedback resistances.
4. The R7-C4-C6 is the compensation circuit for error amplifier 1.
5. The R8-C5-C7 is the compensation circuit for error amplifier 2.
6. The R3-C1 is used to decide FP5452 PWM frequency.
7. The C2 is the FP5452 short circuit protection delay time capacitor.
This datasheet contains new product information. Feeling Technology reserves the rights to modify the product specification without notice.
No liability is assumed as a result of the use of this product. No rights under any patent accompany the sales of the product.
Website: http://www.feeling-tech.com.tw
Rev. 1.0
19/21
FP5452
Package Outline
SOP-16L
UNIT: mm
Symbols
Min. (mm)
1.346
0.101
1.244
9.804
3.810
5.791
0.406
0°
Max. (mm)
1.752
0.254
1.651
10.007
3.987
6.197
1.270
8°
A
A1
A2
D
E
H
L
θ°
Note:
1. Package dimensions are in compliance with JEDEC outline: MS-012 AC.
2. Dimension “D” does not include molding flash, protrusions or gate burrs.
3. Dimension “E” does not include inter-lead flash or protrusions.
This datasheet contains new product information. Feeling Technology reserves the rights to modify the product specification without notice.
No liability is assumed as a result of the use of this product. No rights under any patent accompany the sales of the product.
Website: http://www.feeling-tech.com.tw
Rev. 1.0
20/21
FP5452
SSOP-16L
UNIT: mm
Max. (mm)
Symbols
Min. (mm)
1.346
A
A1
A2
b
1.752
0.254
1.498
0.304
0.279
0.254
0.228
5.003
3.987
6.197
1.270
0.101
0.203
0.203
0.177
0.177
4.800
3.810
5.791
0.406
b1
c
c1
D
E1
E
L
e
0.635 BASIC
θ°
0°
8°
Note:
2. Package dimensions are in compliance with JEDEC outline: MO-137 AB.
3. Dimension “D” does not include molding flash, protrusions or gate burrs.
4. Dimension “E” does not include inter-lead flash or protrusions.
This datasheet contains new product information. Feeling Technology reserves the rights to modify the product specification without notice.
No liability is assumed as a result of the use of this product. No rights under any patent accompany the sales of the product.
Website: http://www.feeling-tech.com.tw
Rev. 1.0
21/21
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