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U3525 Datasheet

  • U3525

  • REGULATING PWM IC

  • 289.10KB

  • 9頁

  • UTC-IC

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UNISONIC TECHNOLOGIES CO., LTD
U3525
REGULATING PWM IC
DESCRIPTION
The UTC
U3525
is a pulse width modulator IC and designed for
switching power supplies application to improve performance and
reduce external parts usage.
A shutdown terminal controls both the soft-start circuitry and the
output stages, providing instantaneous turn off through the PWM
latch with pulsed shutdown, as well as soft-start recycle with longer
shutdown commands. The output stage features NOR logic, giving
a LOW output for an OFF state. An under-voltage lockout circuitry,
which keeps the outputs off and the soft-start capacitor discharged
for sub-normal input voltages, includes approximately 500 mV of
hysteresis for jitter free operation. The PWM circuits also feature a
latch following the comparator. When a PWM pulses has been
terminated, the outputs will remain off for the duration of the period.
The latch is reset with each clock pulse. The output stages are
totem-pole designs capable of sourcing or sinking in excess of
200mA.
LINEAR INTEGRATED CIRCUIT
SOP-16
DIP 16
-
*Pb-free plating product number: U3525L
FEATURES
* Input Voltage: 8~35V
* On-chip +5.1V reference is trimmed to 鹵1%
* 100HZ ~ 500KHZ oscillator range
* Separate oscillator sync terminal
* Adjustable dead time control
* Internal soft-start
* Pulse-by-pulse shutdown
* Input under-voltage lockout with hysteresis
* Latching PWM to prevent multiple pulses
* Dual source/sink output drivers
ORDERING INFORMATION
Order Number
Normal
Lead Free Plating
U3525-D16-T
U3525L-D16-T
U3525-S16-R
U3525L-S16-R
U3525-S16-T
U3525L-S16-T
Package
DIP-16
SOP-16
SOP-16
Packing
Tube
Tape Reel
Tube
U3525L-D16-T
(1)Packing Type
(2)Package Type
(3)Lead Plating
(1) R: Tape Reel, T: Tube
(2) D16: DIP-16, S16: SOP-16
(3) L: Lead Free Plating Blank: Pb/Sn
,
www.unisonic.com.tw
Copyright 漏 2005 Unisonic Technologies Co., Ltd
1of 9
QW-R103-032,A

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