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PDF FP5352 Data sheet ( Hoja de datos )
| Número de pieza | FP5352 | |
| Descripción | PHASE SHIFT DUAL PWM IC | |
| Fabricantes | Feeling Technology | |
| Logotipo |  |
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Technology
FP5352
PHASE SHIFT DUAL PWM IC
WITH SCP/OVP FUNCTION
GENERAL DESCRIPTION
The FP5352, an 1-chip composed of dual channel phase shift 180 totem-pole output stage
pulse-width-modulation control circuits with two independent error amplifiers for step-down
converter application, the inverting input of amplifier connects to a 1.0V precision reference
regulator, power down under-voltage lockout circuit (UVLO), short circuit and over voltage
shutdown and auto-restart protection circuit (SCP/OVP) and dead-time control circuit (DTC),
applied to offer the space and low cost in many applications of PC peripherals .
FEATURES
Internal EA Bias Reference Voltage: 1.0V
Reference Voltage Precision: 2%
Totem-pole Output for MOS Driving
Dual PWM Output Phase Shift 180
Wide operating voltage range: 3.6~25V
Variable Dead-time Control (DTC)
Power Down Under-voltage Lock-out (UVLO)
SC/OV Protection (SCP/OVP)
Protection Shutdown and Auto-restart
Shutdown Mode (ON/OFF)
Programming Oscillation Frequency
Package: SOP16/SSOP16
SOP16
SSOP 16
TYPICAL APPLICATION
PC Peripherals
Networking products
Royer CCFL Inverter
Portable products
Website: http://www.feeling-tech.com.tw
Rev0.1 July. 20, 2006
P1/FP5352
1 page  
Technology
FP5352
DC ELECTRICAL CHARACTERISTICS
Electrical characteristics over recommended operating free-air temperature range, VCC=6V,
f=200kHz (unless otherwise noted)
Reference section
PARAMETER
Output voltage
Input voltage regulation
Output voltage change with
Temperature
SYMBOL TEST CONDITIONS
VREF COMP connected to FB
VREF /VREF Vcc=3.6V 20V
TA=-20 to 25
TA=25 to 85
MIN
0.98
TYP
1.0
2
-0.1
-0.2
MAX
1.2
12.5
±1
±1
UNIT
V
mV
%
Under voltage lockout section
PARAMETER
Upper threshold voltage(Vcc)
Lower threshold voltage(Vcc)
Hysteresis (Vcc)
SYMBOL
VUPPER
VLOW
VHYS
TEST CONDITIONS
TA=25
MIN TYP MAX UNIT
3.2 V
3.0 V
100 200
mV
Short-circuit protection control section
PARAMETER SYMBOL TEST CONDITIONS
SCP standby voltage
VSB
Vcomp <1.5V
SCP threshold voltage
VTH
Vcomp >1.5V
SCP re-start charge current
IRSC
Vcomp >1.5V
SCP re-start / hold time
SCP comparator 1 threshold
voltage
TRS /THOLD
VCOMP(TH)
Vcomp >1.5V
Note1:Function Diagram figure 25
MIN TYP MAX UNIT
0.5 V
1.0 V
25 A
1/35
1.5 V
Oscillator section
PARAMETER
Frequency
Frequency change with voltage
Frequency change with
Temperature
Voltage at RT
SYMBOL
f
f/ V
f/ T
VRT
TEST CONDITIONS
RT=100K
VCC=3.6V to 20V
TA=-20 to 25
MIN TYP MAX UNIT
150 KHZ
0.2 %
-0.4 ±2
%
1V
Website: http://www.feeling-tech.com.tw
Rev0.1 July. 20, 2006
P5/FP5352
5 Page 
Technology
FP5352
output of FP5352 is active and DTC pin is working in soft-start state or limitation of duty cycle.
CSCP discharging time from 1.4V to 0.2V is the second shutdown phase which finishes and
FP5352 would be release shutdown state and re-start the normal operation. Figure 23 is a
relation description about SCSAR pin and the other pins of FP5352.
SCP Comparator 1 Threshold Voltage
1.5V
COMP
V TH2
V TH1
VCSCP
I TH1
Short Circuit
Occured
I TH2
OUT
DTC
VCC
1.4V
0.7V
I TH3
V TH3
0.2V
3.0V
NORMAL OPERATION
SHUTDOWN
PHASE2
PHASE1
RE-START
Figure 23. Shutdown and Re-start waveform
The formulas are shown below for shutdown and re-start time calculation:
AUTO RE-START time equation:
t RE−START
= VTH1 ∗ CSCP
I TH 1
SHUTDOWN time equation:
( ) ( )tSHUTDOWN
= tPHASE1 + tPHASE2 =
VTH 2 −VTH1
ITH 2
∗ CSCP
+
VTH 2 −VTH 3
ITH 3
∗ CSCP
Website: http://www.feeling-tech.com.tw
Rev0.1 July. 20, 2006
P11/FP5352
11 Page | ||
| Páginas | Total 18 Páginas | |
| PDF Descargar | [ Datasheet FP5352.PDF ] | |
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