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PDF DP2532 Data sheet ( Hoja de datos )
| Número de pieza | DP2532 | |
| Descripción | High Precision CC/CV Primary-Side PWM Controller | |
| Fabricantes | DEPP Microelectronics | |
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DP2532
High Precision CC/CV Primary-Side PWM Controller
GENERAL DESCRIPTION
DP2532 is a high performance offline PWM
controller for low power AC/DC charger and
adapter applications. It operates in primary-side
sensing and regulation. Consequently,
opto-coupler and TL431 could be eliminated. High
Precision Constant Voltage (CV) and Constant
Current (CC) control are integrated as shown in
the figure below.
In CC control, the current and output power setting
can be adjusted externally by the sense resistor Rs
at CS pin. In CV control, multi-mode operations are
utilized to achieve high performance and high
efficiency. In addition, good load regulation is
achieved by the built-in Cable Drop Compensation.
Device operates in PFM in CC mode as well at
large load condition and it operates in PWM with
frequency reduction at light/medium load. The chip
consumes very low operation current, it can
achieve less than 80mW standby power.
DP2532 offers comprehensive protection coverage
with auto-recovery features including
Cycle-by-Cycle current limiting, VDD Over Voltage
Protection (VDD OVP), short circuit protection,
built-in leading edge blanking, VDD under voltage
lockout (UVLO), OTP, etc.
High precision constant voltage (CV) and constant
current (CC) can be achieved by DP2532.
DP2532 is offered in SOT23-6 package..
TYPICAL APPLICATION
FEATURES
■ ± 5% Constant Voltage Regulation and
■ Current Regulation at Universal AC Input
Primary Side Regulation (PSR) Without TL431
and Opto-coupler
■ No Need for Control Loop Compensation
■ Programmable CV and CC Regulation
■ Multi-Mode PWM/PFM Operation
■ Output Short Load Protection
■ Less than 80mW Standby Power
■ Built-in Line Voltage and Primary Winding
Inductance Compensation
■ Built-in Adaptive Current Peak Regulation
■ Programmable Cable Drop Compensation
■ Audio Noise Free Operation
■ Built-in Over Temperature Protection (OTP)
■ Soft Gate Driver for Good EMI Performance
■ Built-in Leading Edge Blanking (LEB)
■ Cycle-by-Cycle Current Limiting
■ VDD Under Voltage Lockout with Hysteresis
(UVLO)
■ VDD OVP & Clamp
APPLICATIONS
Low Power AC/DC offline SMPS for
■ Cell Phone Charger
■ Digital Camera Charger
■ Small Power Adapter
■ Auxiliary Power for PC, TV etc.
■ Linear Regulator/RCC Replacement
www.depuw.com
- 1 -/9
Rev.2.0 AUG 2011
1 page  
DP2532
High Precision CC/CV Primary-Side PWM Controller
ELECTRICAL CHARACTERISTICS
(TA = 25OC, VDD=18V if not otherwise noted)
Symbol
Parameter
Supply Voltage Section (VDD Pin)
IVDD_st
Start-up current into VDD
pin
IVDD_Op
Operation Current
IVDD_standby
VDD_ON
Standby Current
VDD Under Voltage
Lockout Exit
VDD_OFF
VDD Under Voltage
Lockout Enter
VDD_OVP
VDD_Clamp
VDD OVP Threshold
VDD Zener Clamp
Voltage
Feedback Input Section (INV Pin)
VINV_REF
Internal Error Amplifier
(EA) Reference Input
VINV_SLP
Short Load Protection
(SLP) Threshold
TINV_Short
Short Load Protection
(SLP) Debounce Time
VINV_DEM
Demagnetization
Comparator Threshold
Toff_min
Toff_max
ICable_max
Minimum OFF time
Maximum OFF time
Maximum Cable Drop
compensation current
Current Sense Input Section (CS Pin)
TLEB
CS Input Leading Edge
Blanking Time
Vcs(max)
TD_OCP
Current limiting threshold
Over Current Detection
and Control Delay
Over temperature Protection
Test Conditions
VINV=3V,GATE=0.5nF,
VDD=20V
I(VDD ) = 7 mA
GATE=0.5nF
TSD Thermal Shutdown
TRC Thermal Recovery
Gate Drive Output (GATE Pin)
VG_Clamp
Output Clamp Voltage
Level
T_r Output Rising Time
T_f Output Falling Time
VDD=24V
GATE=0.5nF
GATE=0.5nF
Min Typ Max Unit
2 20 uA
1 1.5 mA
0.5 1 mA
15 16.3 17.5 V
8 9 10
28 30 32
32.5 34.5 36.5
V
V
V
1.97 2.0 2.03 V
0.7 V
10 ms
25 mV
2 us
5 ms
63 uA
500
490 500 510
100
ns
mV
ns
--- 165 --
135 --
°C
°C
16 V
700 ns
40 ns
www.depuw.com
- 5 -/9
Rev.2.0 AUG 2011
5 Page | ||
| Páginas | Total 9 Páginas | |
| PDF Descargar | [ Datasheet DP2532.PDF ] | |
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