Power Switch. DP1804 Datasheet

DP1804 Switch. Datasheet pdf. Equivalent


DEVELOPER MICROELECTRONICS DP1804
DP1804
Quasi-Resonant PSR CC/CV PWM Power Switch
FEATURES
Low Cost Solution Built-in 750V power BJT
Quasi-Resonant Primary Side Regulation
(QR-PSR) Control with High Efficiency
Multi-Mode PSR Control
Fast Dynamic Response
Built-in Dynamic Base Drive
Audio Noise Free Operation
±4% CC and CV Regulation
Low Standby Power <70mW
Programmable Cable Drop Compensation
(CDC) in CV Mode
Built-in AC Line & Load CC Compensation
Build in Protections:
Short Load Protection (SLP)
Cycle-by-Cycle Current Limiting
Leading Edge Blanking (LEB)
Pin Floating Protection
VDD OVP & UVP & Clamp
Over temperature protection(OTP)
Available with DP1804 Versions in SOP-7
Package
APPLICATIONS
Battery Chargers for Cellular Phones
AC/DC Power Adapter and LED Lightings
GENERAL DESCRIPTION
DP1804 is a high performance Quasi Resonant
(QR) Primary Side Regulation (PSR) PWM power
switch with high precision CV/CC control ideal for
charger applications.
In CV mode, DP1804 adopts Multi Mode QR
Control which uses the hybrid of AM (Amplitude
Modulation) mode and (Frequency Modulation)
FM mode to improve system efficiency and
reliability. In CC mode, the IC uses PFM control
with line and load CC compensation. The IC can
achieve fast dynamic response. The built-in Cable
Drop Compensation (CDC) function can provide
excellent CV performance.
DP1804 integrates functions and protections of
Under Voltage Lockout (UVLO), VDD over Voltage
Protection (VDD OVP), Cycle-by-cycle Current
Limiting (OCP), Short Load Protection (SLP), On-
Chip Thermal Shutdown, VDD Clamping, etc.
TYPICAL APPLICATION CIRCUIT
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-1-/11
Rev.1.1


DP1804 Datasheet
Recommendation DP1804 Datasheet
Part DP1804
Description Quasi-Resonant PSR CC/CV PWM Power Switch
Feature DP1804; DP1804 Quasi-Resonant PSR CC/CV PWM Power Switch FEATURES  Low Cost Solution Built-in 750V power B.
Manufacture DEVELOPER MICROELECTRONICS
Datasheet
Download DP1804 Datasheet




DEVELOPER MICROELECTRONICS DP1804
Pin Configuration
DP1804
Quasi-Resonant PSR CC/CV PWM Power Switch
Marking Information
DPXXXX for product name;
XXXXXX The first X reresents the last year,2014 is 4; The second X represents the month, in A-L 12
letters;The third and fourth X on behalf of the date, 01-31 said; The last two X represents the wafer
batch code.
Pin Description (DP1804)
Pin
Number
Pin
Name
I/O
1
VDD
P
2 FB I
3 NC NC
4 CS I
5,6 HV O
Description
Power Supply Pin of the Chip.
System feedback pin which regulates both the output voltage in CV
mode and output current in CC mode based on the flyback voltage of
the auxiliary winding.
Current Sense Input Pin.
The Power BJT Collector
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-2-/11
Rev.1.1



DEVELOPER MICROELECTRONICS DP1804
DP1804
Quasi-Resonant PSR CC/CV PWM Power Switch
7
GND
P The Ground of the IC
Block Diagram
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-3-/11
Rev.1.1







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