DP9502AB datasheet(8/10 Pages) DEPUW

8 / 10 page

www.publicxin.com

Peng Jijun

13326967551 translated to English by Yevhen Stadnik 380972333363

DP950XB

Non-Isolated, Step-Down Quasi-Resonant LED Power Switch

When Tdem<Tovp, the system will trigger the output

overvoltage protection. When designing the

system, the required ROVP resistor value can be

calculated based on the required overvoltage

protection voltage (VOVP):

(V) R (ohm)

□

Soft Driver

DP950XB is designed with soft driving circuit to

effectively reduce EMI noise.

OVP

= 0.08

OVP

L(mH)

(kohm)

□

Automatic restart protection

When the LED is open circuit or the output is overvoltage,

the circuit enters the automatic restart mode. At this time,

the internal power MOSFET stops conducting and the

internal timer starts working. When the timer counts to

16ms, the chip will reset the protection logic and enter the

restart mode. However, if the fault does not disappear after

the restart, the chip will repeat the above protection actions

until the fault disappears.

□

Over temperature protection (OTP)

DP950XB has an internal overheat protection function.

When the chip detects that the junction temperature exceeds

145℃, the internal output current reference begins to

gradually decrease until the temperature reaches equilibrium,

as shown in Figure 1. The overheat protection function

limits the maximum temperature of the system and improves

the reliability of the system.

LED

current

Overheat

protection

Figure 1

Current

, mA

Temperature, ℃

DP9502AB 데이터시트(PDF) 8 Page - Shenzhen Developer Microelectronics Co., Ltd

DP9502AB 데이터시트(HTML) 8 Page - Shenzhen Developer Microelectronics Co., Ltd

Html Pages

1 2 3 4 5 6 7 8 9 10

데이터시트 다운로드

링크 URL