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STR-W6253D

Allegro Microsystems
Part Number STR-W6253D
Manufacturer Allegro Microsystems
Description 60 W-Universal Input/90 W-230 Vac Input PWM Switching Regulators
Published Jun 30, 2011
Detailed Description STR-W6253D 60 W-Universal Input/90 W-230 Vac Input PWM Switching Regulators Features and Benefits ▪ Overcurrent protecti...
Datasheet PDF File STR-W6253D PDF File

STR-W6253D
STR-W6253D

Overview
STR-W6253D 60 W-Universal Input/90 W-230 Vac Input PWM Switching Regulators Features and Benefits ▪ Overcurrent protection (OCP) with ac input voltage compensation function; no additional peripheral circuits required—minimizes dependency of OCP on ac input ▪ Overload protection (OLP) with integrated timer reduces power stress (temperature rise) at overload condition, requires no peripheral components ▪ Avalanche-guaranteed MOSFET improves device capability of withstanding excess surge voltage, providing a simple surge absorber circuit without breakdown voltage derating ▪ Start-up circuit eliminates the need for a start-up resistor, and helps to reduce input power consumption Continued on the next page… Description The STR-W6200D series are current-mode PWM ICs that incorporate controller chips.
These devices are manufactured using a proprietary high-voltage BCD process, and avalancheguaranteed MOSFETs.
These elements allow power supply systems designs that are highly reliable and simple, with fewer peripheral components.
These ICs also provide Auto-Burst mode operation, which lowers input power requirements at light loads, and improves efficiency over the entire load range and universal-input range.
Applicatons include: ▪ ▪ ▪ ▪ TV set top box LCD PC monitor, LCD TV Printer, scanner General consumer, PC, and industrial applications requiring SMPS power supply with standby mode Package: TO-220 Not to scale Functional Block Diagram VCC 7.
1 V STARTUP UVLO 15.
5 V/ 8.
9 V 7.
1 V D/ST REG VREG 28.
5 V OVP ELP TSD RST R SQ =1.
6 mA I startup DMAX 75% RQ S DRV PWM OSC SQ R S2 Q FM/ELP Frequency Modulation 12 V 7.
8 V OLP CK S1 tOLP = tFM ×32 R OCP Drain Peak Current Compensation 160 μA FB Slope Compensation Feedback Control LEB S/OCP GND www.
DataSheet4U.
com 28103.
53 STR-W6253D 60 W-Universal Input/90 W-230 Vac Input PWM Switching Regulators Features and Benefits (continued) ▪ Bias Assist function improves start-up performance by selfbiasing the V...


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