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PDF FP5472 Data sheet ( Hoja de datos )
| Número de pieza | FP5472 | |
| Descripción | DUAL PWM CONTROL IC | |
| Fabricantes | Feeling Technology | |
| Logotipo |  |
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Technology
FP5472
DUAL PWM CONTROL IC
WITH SCP/DTC FUNCTION
GENERAL DESCRIPTION
The FP5472, a 1-chip composed of totem-pole output stage pulse-width-modulation control
circuits with two error amplifiers and dead-time comparators (DTC), the FP5472 contains a
2.5V precision voltage reference regulator, under-voltage lockout circuit (UVLO), short circuit
protection circuit (SCP), applied to offer space and low cost in many applications such as the
DC/DC converter and backlight inverter.
Using few external components, FP5472, a high performance integrated IC, is designed for a
control circuit. The circuit diagram of the typical application example is as below.
FEATURES
Fixed Reference Voltage: 2.5V
Reference Voltage Precision: 2% (FP5472)
Totem-pole output stage
Low quiescent supply current under 3.5mA
Wide operating voltage range: 3.6~40V
Variable dead-time control (DTC)
UVLO protection function
SCP protection function (threshold voltage: 1.3V)
Oscillator Frequency: Max. 500KHz
Package: PDIP16/SOP16/SSOP16
SOP16
PDIP 16
TYPICAL APPLICATION
DC/DC converters for video cameras and TFT LCD monitor etc.
Back light CCFL inverter.
Rev0.2 May 19, 2006
P1/FP5472
1 page  
Technology
FP5472
DC ELECTRICAL CHARACTERISTICS
Electrical characteristics over recommended operating free-air temperature range, VCC=6V,
f=200kHz (unless otherwise noted)
Reference section
PARAMETER
Output voltage (pin 16)
Output voltage change with
Temperature
Input voltage regulation
Output voltage regulation
Short-circuit output current
SYMBOL TEST CONDITIONS
VREF
IO=1mA
TA=-20 to 25
TA=25 to 85
VREF /VREF Vcc=3.6V 40V
VREF /VREF Io = 0.1mA to 1 mA
ISHORT VO=0
MIN
2.45
3
TYP
2.5
-0.1%
-0.2%
2
1
10
MAX
2.55
±1%
±1%
12.5
7.5
30
UNIT
V
mV
mV
mA
Undervoltage lockout section
PARAMETER
Upper threshold voltage(Vcc)
Lower threshold voltage(Vcc)
Hysteresis (Vcc)
Reset threshold voltage(Vcc)
SYMBOL
VUPPER
VLOW
VHYS
VRESET
TEST CONDITIONS
IO(REF) = 0.1 mA,
TA=25
MIN TYP MAX UNIT
2.72 V
2.6 V
80 120
mV
1.0 1.3
V
Short-circuit protection control section
PARAMETER
Input threshold voltage (SCP)
Standby voltage (SCP)
Latched input voltage (SCP)
Input (source) current
Comparator threshold voltage
(FEEDBACK)
SYMBOL
VTH
VSTANDBY
VLATCH
ISOURCE
VCOMP(TH)
TEST CONDITIONS
TA= 25
No pullup
No pullup
VI=0.7V, TA=25
MIN TYP MAX UNIT
1.2 1.3 1.5
V
60 80 100 mV
40 60 mV
-1. -2.0 -2.5
A
1.20 V
Oscillator section
PARAMETER
Frequency
Standard deviation of
frequency
Frequency change with voltage
Frequency change with
Temperature
SYMBOL
f
f
f/ V
f/ T
TEST CONDITIONS
CT=330pF,RT=10K
CT=330pF,RT=10K
VCC=3.6V to 40V
TA=-20 to 25
TA=25 to 85
MIN TYP MAX UNIT
220 KHZ
10%
1%
-0.4%
-0.2%
±2%
±2%
Dead-time control section
PARAMETER
Input bias current (DTC)
Latch mode (source) current(DTC)
Latched input voltage (DTC)
Input threshold voltage at
f=10kHZ(DTC)
SYMBOL
IBIAS
ISOURCE
VLATCH
VTH
TEST CONDITIONS
TA=25
IO=40 A
Zero duty cycle
Maximum duty cycle
MIN TYP MAX UNIT
1A
-80 -260
A
2.2 2.3
V
2.05 2.25
1.2 1.35
V
Rev0.2 May 19, 2006
P5/FP5472
5 Page 
Technology
FP5452 TIMING WAVEFORM
Oscillator Triangle Waveform
Error Amplifier Output
Dead-Time Input Voltage
Short-Circuit Protection
Comparator Input Voltage
PWM Comparator Output
Voltage
Output Transistor
CollectoWr aveform
Protection Enable
Terminal Waveform
Short-Circuit Protection
Comparator Output
Power Supply
Voltage
2.8 V TYP
Protection Enable Time, tpe = (0.658 * 10E6 * Cpe) in seconds
FP5472 Timing Diagram
FP5472
2.0 V
1.6 V
1.4 V
1.25 V
H
L
Dead Time
100%
H
L
1.3 V
tp 0 V
e
H
L
3.6 V
0V
Rev0.2 May 19, 2006
P11/FP5472
11 Page | ||
| Páginas | Total 19 Páginas | |
| PDF Descargar | [ Datasheet FP5472.PDF ] | |
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