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PDF FP5462 Data sheet ( Hoja de datos )
| Número de pieza | FP5462 | |
| Descripción | BUCK/BOOST PWM CONTROL IC | |
| Fabricantes | Feeling Technology | |
| Logotipo |  |
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Technology
FP5462
BUCK/BOOST PWM CONTROL IC
WITH SCP/DTC FUNCTION
GENERAL DESCRIPTION
The FP5462, a 1-chip composed of totem-pole output stage pulse-width-modulation control
circuits with two error amplifiers and dead-time comparators (DTC), the FP5462 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.
Using few external components, FP5462, 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: 1%
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
TYPICAL APPLICATION
DC/DC converters for video cameras and TFT LCD monitor etc.
1-ch Boost/1-ch Buck Topology Converter
PDIP 16
SOP16
SSOP 16
Website: http://www.feeling-tech.com.tw
Rev0.2 Sep. 29, 2005
P1/FP5462
1 page  
Technology
FP5462
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～30V
△ VREF /VREF Io = 0.1mA to 1 mA
ISHORT VO=0
MIN
2.475
3
TYP
2.5
-0.1%
-0.2%
2
1
10
MAX
2.525
±1%
±1%
12.5
7.5
30
UNIT
V
mV
mV
mA
Undervoltage lockout section
PARAMETER
SYMBOL TEST CONDITIONS
Upper threshold voltage(Vcc)
Lower threshold voltage(Vcc)
Hysteresis (Vcc)
Reset threshold voltage(Vcc)
VUPPER
VLOW
VHYS
VRESET
IO(REF) = 0.1 mA,
TA=25℃
MIN TYP MAX UNIT
2.72
2.6
80 120
1.5 1.9
V
V
mV
V
Short-circuit protection control section
PARAMETER
SYMBOL TEST CONDITIONS MIN TYP MAX UNIT
Input threshold voltage (SCP)
VTH TA= 25℃
1.2 1.3 1.5
V
Standby voltage (SCP)
VSTANDBY No pullup
220 265 300 mV
Latched input voltage (SCP)
VLATCH No pullup
220 280 mV
Input (source) current
Comparator threshold voltage
(FEEDBACK)
Oscillator section
PARAMETER
ISOURCE VI=0.7V, TA=25℃
VCOMP(TH)
SYMBOL TEST CONDITIONS
-1. -2.0 -2.5 μ A
1.30 V
MIN TYP MAX UNIT
Frequency
Standard deviation of
frequency
Frequency change with voltage
f
△f
△ f/△ V
CT=330pF,RT=10K
CT=330pF,RT=10K
VCC=3.6V to 30V
200
10%
1%
KHZ
Frequency change with
Temperature
△ f/△ T
TA=-20℃ to 25℃
TA=25℃ to 85℃
-0.4% ±2%
-0.2% ±2%
Website: http://www.feeling-tech.com.tw
Rev0.2 Sep. 29, 2005
P5/FP5462
5 Page 
Technology
TYPICAL CHATACTERISTICS (Cont.)
OUTPUT TRANSISTOR ON DUTY CYCLE
VS
DEAD - TIME INPUT VOLTAGE
0
10 Vcc = 3.6 V
CT = 330pF
20 RT = 10 K
30
40
50
60
70
80
90
100
0 0.5 1 1.5 2 2.5 3 3.5 4
Dead - Time Input Voltage - V
Figure 13
FP5462
STANDBY CURRENT
VS
SUPPLY VOLTAGE
TA = 25 oC
4.5
4
3.5
3
2.5
2
1.5
1
0
0 10 20 30
Vcc - Supply Voltage - V
Figure 14
40
STANDBY CURRENT
VS
FREE - AIR TEMPERATURE
5
4.5
4
3.5
3
2.5
2
1.5
1
-25
Average Supply Current
Vcc = 6 V CT = 330pF
RT = 10 K
Standby Current
Vcc = 40 V, No Load
Standby Current
Vcc = 3.6 V, No Load
0
25 50
75
TA - Free-Air Temperature - oC
Figure 15
100
Website: http://www.feeling-tech.com.tw
GAIN (AMPLIFIER IN UNITY-GAIN
CONFIGURATION)
VS
FREQUENCY
10
Vcc = 5 V
TA = 25 oC
5
0
-5
- 10
- 15
- 20
1K
10K 100K
f - Frequescy - Hz
Figure 16
1M
10M
Rev0.2 Sep. 29, 2005
P11/FP5462
11 Page | ||
| Páginas | Total 26 Páginas | |
| PDF Descargar | [ Datasheet FP5462.PDF ] | |
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