FP5451A [FEELING]
Dual Channel PWM Controller with SCP / DTC Function;
| 型号： | FP5451A |
| 厂家： | 
Feeling Technology |
| 描述： | Dual Channel PWM Controller with SCP / DTC Function |
| 文件： | 总14页 (文件大小：538K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
FP5451A
Dual Channel PWM Controller with SCP / DTC Function
General Description
The FP5451A 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 under voltage
lockout circuit (UVLO). It offers space and low cost in many applications such as the DC / DC
converters and backlight inverters.
Using FP5451A, 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: 4~40V
Feedback Reference Voltage: 2.5V
Reference Voltage Precision: 1%
Output Sink Current up to 100mA
Oscillator Frequency: Max. 500KHz
Low Quiescent Supply Current
Variable Duty Control (DTC)
UVLO Protection Function
SCP Protection Function (Typ. 1.3V)
Package: SOP-16L / SSOP-16L
Applications
Dual Output Switch Regulator
Backlight Inverter
LCD Monitor
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
1/14
FP5451A
Function Block Diagram
VCC
RT
CT
DTC2
FB2
OUT2
EA2+
EA2-
Oscillator
PWM
COMP
1/2 VREF
Reference
Voltage
VREF
SCP
R
S
UVLO
Iscp
R
OUT1
EA1+
EA1-
PWM
COMP
FB1
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
2/14
FP5451A
Pin Descriptions
Name No. I / O
Description
Connect a Capacitor for Oscillator
Frequency Adjustment
Connect a Resistor for Oscillator Frequency
Adjustment
SOP-16L
CT
RT
1
2
I
I
Top View
1
16
15
14
13
12
11
10
9
VREF
CT
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
2
RT
SCP
EA2+
EA2-
FB2
5
O
I
3
EA1+
DTC1
OUT1
GND
VCC
6
4
EA1-
7
O
P
P
O
I
8
IC Ground
5
FB1
9
IC Power Supply
6
DTC1
DTC2
OUT2
VCC
OUT2
DTC2
FB2
10
11
12
13
14
Output 2 Totem-pole Output
7
8
Output 2 Dead-Time Comparator
Output 2 Error Amplifier Output
Output 2 Error Amplifier Inverting Input
Output 2 Error Amplifier Non-inverting Input
OUT1
GND
O
I
EA2-
EA2+
I
Connect a Capacitor to Set Short Circuit
Protection Timing
SCP
VREF
15
16
I
O
2.5V Reference Voltage Output
SSOP-16L
Name No. I / O
Description
Connect a Capacitor for Oscillator
Frequency Adjustment
Connect a Resistor for Oscillator Frequency
Adjustment
CT
RT
1
2
I
I
Top View
1
16
15
14
13
12
11
10
9
CT
VREF
2
RT
SCP
EA2+
EA2-
FB2
DTC2
OUT2
VCC
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+
4
5
6
7
8
EA1-
FB1
DTC1
OUT1
GND
5
O
I
DTC1
OUT1
GND
VCC
6
7
O
P
P
O
I
8
IC Ground
9
IC Power Supply
OUT2
DTC2
FB2
10
11
12
13
14
Output 2 Totem-pole Output
Output 2 Dead-Time Comparator
Output 2 Error Amplifier Output
Output 2 Error Amplifier Inverting Input
Output 2 Error Amplifier Non-inverting Input
O
I
EA2-
EA2+
I
Connect a Capacitor to Set Short Circuit
Protection Timing
SCP
VREF
15
16
I
O
2.5V Reference Voltage Output
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
3/14
FP5451A
Marking Information
SOP-16L
SSOP-16L
FP5451A
-
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
4/14
FP5451A
Ordering Information
Part Number
Operating Temperature
Package
SOP-16L
SSOP-16L
MOQ
2500EA
2500EA
Description
Tape & Reel
Tape & Reel
FP5451ADR-LF
FP5451ARR-LF
-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
VO
IO
Differential Input Voltage
Collector Output Voltage
Collector Output Voltage
Maximum Junction Temperature
20
V
40
V
150
+150
+90
+110
+45
+55
650
450
+150
mA
Tj
°C
SOP-16L
SSOP-16L
SOP-16L
SSOP-16L
°C / W
°C / 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 Range
-65
℃
℃
Lead Temperature (soldering, 10
sec)
+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
5/14
FP5451A
Recommended Operating Conditions
Parameter
Symbol
Conditions
Min.
4
Typ.
Max.
40
Unit
V
Supply Voltage
Operating Temperature
-20
+85
℃
DC Electrical Characteristics (VCC= 6V, f=270kHz, unless otherwise noted)
Parameter
Reference Section
Output Voltage (pin 16)
Symbol
Test Conditions
Min.
Typ.
Max.
Unit
VREF IO=1mA
2.45
2.5
-0.1
-0.2
2.55
±1
V
%
%
TA=-20℃ to +25℃
TA=+25℃ to +85℃
Output Voltage Change with
Temperature
±1
△VREF
VREF
△VREF
VREF
/
/
V
CC=3.6V～40V
Input Voltage Regulation
Output Voltage Regulation
1
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
VLOW
2.8
2.6
120
1.9
V
V
I
O (REF) = 0.1 mA, TA=25℃
Hysteresis (VCC
)
VHYS
80
mV
V
Reset Threshold Voltage (VCC
)
VRESET
1.5
Short-circuit Protection Control Section
Input Threshold Voltage (SCP)
Standby Voltage (SCP)
VTH
1.2
60
1.3
80
40
-2
1.5
100
60
V
TA= 25℃
VSTANDBY No Pull-up
VLATCH No Pull-up
mV
mV
μA
Latched Input Voltage (SCP)
Input (Source) Current
ISOURCE
-1.5
-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
270
10
KHZ
%
Standard Deviation of Frequency
Frequency Change with Voltage
△f
△f / △V VCC=3.6V to 40V
1
%
-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
2.3
-200
TA=25℃
Latched Input Voltage (DTC)
VLATCH
V
V
V
IO=40μA
Zero Duty Cycle
Maximum Duty Cycle
2.05
1.45
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
6/14
FP5451A
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 Amplification
Unity Gain Bandwidth
AVO
BW
80
1.5
80
dB
MHZ
dB
V
RF=200KΩ
Common Mode Rejection Ratio
Positive Output Voltage Swing
Negative Output Voltage Swing
Output (Sink) Current (Feedback)
CMRR
VPOS
VNEG
ISINK
60
Vref-0.2
1
V
VID= -0.1V, VO=1.25V
1
5.0
mA
Output (Source) Current
(Feedback)
ISOURCE VID=0.1V, VO=1.25V
-90
-140
μA
Output Section
Collector Off State Current
Output Saturation Voltage
Short Circuit Output Current
PWM Comparator Section
IOFF
VSAT
ISC
VO=50V
IO=10mA
VO=6V
10
1
μA
V
0.7
150
mA
Zero Duty Cycle
2.05
1.45
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
1.3
1.7
1.8
2.4
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
7/14
FP5451A
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
FP5451A Timing Diagram
Application Information
+Vin
P1
1
2
POWER IN
+Vin
+5.0V
P2
+
C13
100uF
+
C17
100uF
R4
1K
R5
1K
1
2
C8
OUTPUT #1
Q1
Q2
9435
IC2
C2
R9 0
+3.3V
L2
+5.0V
P3
1
2
R12
0
20uH
R11
10K 1%
R10
OUTPUT #2
REF
D1
SCD24
+
C10
220uF/16V
IC1
CT
2IN+
C1 330pF
1
2
3
4
5
6
7
8
16
15
14
C9
REF
SCP
2IN+
2IN-
2FB
R13
3.3K 1%
RT
R2
33K
R3 10K
1IN+
1IN-
1FB
1DTC
1OUT
GND
R1
33K
13 2IN-
C5 1000pF
C4
1000pF
12
11
10
9
2DTC
2OUT
VCC
R6
33K
C7
R8
R7
C6
FP5451A
C12
R15
1DTC
2DTC
2DTC
2
2
R20
10K
R17
R18
C11
R22
1K
R21
1K
C14
R14
1DTC
1OUT
Q3
Q4
9435
IC3
L3
+3.3V
R25
0
R19
10K
20uH
R26
0
R24
R23
R16
33K
20K 1%
D2
+
C16
220uF/16V
SCD24
C15
R27
12K 1%
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
8/14
FP5451A
Typical Operating Characteristics
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
9/14
FP5451A
ERROR AMP MAXIMUM OUTPUT
VOLTAGE SWING
VS
FREQUENCY
2.5
2.25
2
Vcc = 5 V
= 25 o
T
C
A
1.75
1.5
1.25
1
0.75
0.5
0.25
1K
10K
100K
1M
10M
f - Freques cy - 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
10/14
FP5451A
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
11/14
FP5451A
STANDBY CURRENT
VS
FREE - AIR TEMPERATURE
5
4.5
Average Supply Current
Vcc = 6 V
= 10 KΩ
C = 330pF
T
4
R
T
3.5
3
Standb y Current
Vcc = 3.6 V, No Load
2.5
2
1.5
1
Standby Current
Vcc = 40 V, No Load
-25
0
25
50
75
100
TA - Free-Air Tem perature - oC
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
12/14
FP5451A
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
13/14
FP5451A
SSOP-16L (EP)
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:
1. Package dimensions are in compliance with JEDEC outline: MO-137 AB.
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
14/14
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