DP9503B中文资料德普微电子数据手册PDF规格书

Main Features

□ Integrated high voltage 500V MOSFET

□ Integrated high voltage self-powered circuit

□ No VDD capacitor design

□ ±5% Constant current accuracy

□ Quasi-resonant mode high efficiency operation

□ Ultra-low operating current

□ Excellent line and load regulation

□ Internal protection function:

□ Output Overvoltage Protection (OVP)

□ Cycle-by-Cycle Current Limiting (OCP)

□ Leading Edge Blanking (LEB)

□ LED open and short circuit protection

□ Over temperature protection (OTP)

□ Package type SOP-7 and DIP-7 options

Typical Applications

□ High Power LED Lighting

Product Description

The DP950XB series is a highly integrated constant

current LED power switch. The chip adopts a

quasi-resonant working mode and does not require

auxiliary winding detection and demagnetization.

At the same time, it integrates a high-voltage 500V

power MOSFET and a high-voltage self-powered circuit,

which simplifies the system design and production cost.

The chip integrates high-precision inductor current

sampling technology to obtain high-precision constant

current output, and the output line voltage and load

regulation rate are excellent.

DP950XB integrates complete protection functions to

ensure safe and reliable operation of the system,

such as: VDD undervoltage lockout (UVLO),

cycle-by-cycle current limiting (OCP),

overtemperature protection (OTP),

output overvoltage protection (OVP),

CS setting resistor short-circuit protection,

LED open-circuit and short-circuit protection, etc.