STR-W6251D 반도체 회로 부품 판매점
30 W-Universal Input/45 W-230 Vac Input PWM Switching Regulators
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 Allegro Microsystems |
STR-W6251D
30W-Universal Input/45W-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…
Package: TO-220
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 avalanche-
guaranteed 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
Not to scale
Functional Block Diagram
VCC
UVLO
15.5 V/ 8.9 V
REG
VREG
PWM OSC
DMAX 75%
SQ
R
28.5 V OVP
7.1 V ELP
TSD
7.1 V
RST
R
SQ
RQ
S
STARTUP
Istartup
=1.6 mA
DRV
FM/ELP
www.DataSheet4U.com 12 V
FB
Frequency
Modulation
7.8 V
160 μA
S2 Q
OLP
CK
tOLP = S1
tFM×32 R
Slope
Compensation
OCP
Drain Peak
Current
Compensation
Feedback
Control
LEB
D/ST
S/OCP
GND
28103.51
STR-W6251D
30W-Universal Input/45W-230 Vac Input
PWM Switching Regulators
Features and Benefits (continued)
▪ Bias Assist function improves start-up performance by self-
biasing the VCC pin, and allows a use of a small value VCC
capacitor, resulting in improved response to overvoltage
conditions
▪ Very low current consumption in nonoperating (UVLO) state:
ICC(off) = 5 μA (typical) at VCC= 13.8 V
▪ Slope compensation circuit stabilizes operation, preventing
interference from subharmonics
▪ Leading Edge Blanking
▪ Various protections:
• Overcurrent Protection (OCP), pulse-by-pulse sensing
• Overload Protection (OLP), auto restart after certain duration
• External Latch Protection (ELP), latched
• Overvoltage Protection (OVP), latched
• Thermal Shut Down (TSD), latched
▪ Externally-activated shut down protection (ELP) for
emergency system shut down
▪ Auto-Burst Standby function (pin < 0.1 W at zero output load
condition)
▪ Audible noise reducing function in Standby mode
▪ TO-220 full-molded package with 6 pins
Selection Guide
Part Number
STRW6251D
Packing
50 pieces per tube
Pin-out Diagram
1234567
www.DataSheet4U.com
Terminal List Table
Number
Name
Description
1
D/ST
Drain/startup terminal
2 NC Clipped
3
S/OCP
Source/Overcurrent Protection
terminal
4
VCC
Power supply terminal
5
GND
Ground terminal
6 FB Feedback terminal
7
FM/ELP
Frequency jittering and External
Latch Protection terminal
Functions
MOSFET drain and input of start-up signal
No connection
MOSFET source and input of overcurrent
detection signal
Input of power supply for control circuit
Ground
Input of constant voltage control signal
Control input for frequency jittering control and
External Latch Protection
All performance characteristics given are typical values for circuit or
system baseline design only and are at the nominal operating voltage and
an ambient temperature, TA, of 25°C, unless otherwise stated.
Allegro MicroSystems, Inc.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com
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제조업체: Allegro Microsystems
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STR-W6251D regulator
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국내 전력반도체 판매점
상호 : 아이지 인터내셔날
전화번호 : 051-319-2877
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30 W-Universal Input/45 W-230 Vac Input PWM Switching Regulators - Allegro Microsystems