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DC3131A Datasheet Preview

DC3131A Datasheet

CC&CV Buck Convertor

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DC3131A
32V, 100% Duty Cycle CC&CV Buck Convertor
DESCRIPTION
DC3131A has an optimum input voltage, step-down
converter that operates in either CV (Constant Output
Voltage) mode or CC (Constant Output Current) mode.
Car DVD
Black Box
Industry Application
Other
The maximum input voltage is up to 36V and the
operation input voltage from 7V to 32V.
FEATURES
MOSFET what build in 35mΩ High-Side and 25mΩ
100% Duty Cycle Car Charge Scheme
Low-Side, could deliver up to 3.5A of continuous output
current and the output current accurate to within ±7%.
Build in High-Side and Low-Side MOSFET
Max Output Current: 3.5A
No external compensation component requirement. The
line compensation and the constant current can be set by
an external resistance.
In conclusion, DC3131A is a full function and high
performance, high reliability buck DC-DC converter,
especially suits for BC1.2 and QC2.0/3.0/PFC/AFC
IP application.
APPLICATIONS
Car Charger
Wall Charger
Power Strip/Hub
H Portable charger device
Typical Application
Adjustable Output Voltage, VFB=1.0V
◆Excellent Constant Current Accuracy: ±7%
Constant Voltage Accuracy: ±2%
Jitter Function
Efficiency: Up to 95%
Adjustable Line Compensation
Short Circuit Protection
Over Voltage Protection
Thermal shutdown Protection
Under Voltage Lock Output
Available in SOP-8L Package
C VIN
7~36V
T C1
47uF
HO 50V
C3
0.1uF
BS
VIN
SW
C2
VFB
2.2uF
50V
SW
CSP
CSN
33uH
R1sen
20mΩ
C4
220uF
16V
C5
4.7uF
16V
R1
102K
VOUT2
5V/9V/12V
R2
R3
R4
GND
24.9K 24.9K 33.2K
GND
GND
www.hotchip.com.cn
1/9
Ver1.01




HOTCHIP

DC3131A Datasheet Preview

DC3131A Datasheet

CC&CV Buck Convertor

No Preview Available !

DC3131A
32V, 100% Duty Cycle CC&CV Buck Convertor
TYPICAL APPLICATION
Package
PIN NAME
DESCRIPTION
Power Supply Input. Bypass this pin with a 2.2μF ceramic
1
VIN
capacitor to GND, placed as close to the IC as possible.
1 VIN
2 BS
SW 8
SW 7
Power to the internal high-side MOSFET gate driver. Connect
2
BS
a 22~100nF capacitor from BS pin to VIN pin
3
CSN
Negative Of Current Sense
3 CCSSPN
GND 6
4
CSP
Positive Of Current Sense
5
VFB
Feed Back Of Output Voltage
4 CSNP
VFB 5
6
GND Ground
7
SW
Power Switching Node to External Inductor
8
SW
Power Switching Node to External Inductor
IP ABSOLUTE MAXIMUM RATINGS (at TA = 25°C)
Characteristics
Symbol
Rating
Unit
VIN to GND
SW to GND
-0.3 to 36
V
-0.3 to 36
V
BS to GND
-0.3 to 36
V
H CSP, CSN to GND
-0.3 to 36
V
VFB to GND
Junction to Ambient Thermal Resistance
-0.3 to 6
105
V
C/W
Operating Junction Temperature
-40 to 140
C
C Storage Junction Temperature
-55 to 150
C
Lead Temperature (Soldering 10 sec.)
300
C
Thermal Resistance from Junction to case
θJC
45
C/W
Thermal Resistance from Junction to ambient
θJA
105
C/W
T ESD (HBM)
>4000
V
Note: Exceed these limits to damage to the device. Exposure absolute maximum rating condition may affect
device reliability.
O ELECTRICAL CHARACTERISTICS(VIN=12V, TA= 25°C,unless otherwise stated)
Parameter
Input Voltage
H Input OVP Threshold
Symbol Conditions
VIN
VOVP-VIN
Min Typ Max Units
7
-
32
V
30 32 34
V
UVLO Voltage
VUVLO
6
7
8
V
UVLO Hysteresis
0.5 1 1.5 V
Quiescent Current
Standby Current
ICCQ
ISB
VFB=1.5V, force driver off. - 1.5
-
mA
No Load
- 1.6 2 mA
Reference Voltage Of VFB
VFB
0.98 1 1.02 V
Output OVP detect Voltage
VOVP
Internal define
- 1.2 -
V
Switching Frequency
Maximum Duty Cycle
FSW
DMAX
IOUT=1A
120 135 155 KHz
100 -
%
Minimum On -Time
- 250 -
ns
www.hotchip.com.cn
2/9
Ver1.01


Part Number DC3131A
Description CC&CV Buck Convertor
Maker HOTCHIP
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