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| U3848 Datasheet, PDF (1/12 Pages) Unisonic Technologies – HIGH PERFORMANCE CURRENT MODE PWM CONTROLLERS | |||
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UNISONIC TECHNOLOGIES CO., LTD
UC3848
LINEAR INTEGRATED CIRCUIT
HIGH PERFORMANCE
CURRENT MODE
CONTROLLERS
 DESCRIPTION
The UTC UC3848 is designed to provide several special
enhancements to satisfy the needs: Power-Saving mode for low
standby power, Over Current Protection (OCP), Over Voltage
Protection (OVP), Over Load Protection (OLP), Over Temperature
Protection (OTP) etc protection features. IC will be shutdown when
either protection arise and can auto-restart. UVLO featuring typical
start-up current 20µA, and VCC(ON) 12.6V, VCC(OFF) 8.17. Lower
typical operation current Icc 3.7mA at inactive output. The output
stage, suitable for driving N-Channel MOSFETs, can operate to duty *Pb-free plating product number: UC3848L
cycles approach 70%. The UC3848 are fully pin-to-pin compatible
with UC3842 except VREF-pin and NC-pin. VREF-pinâs application as
application circuits. Pin FB with an 4k⦠pullup resistor to internal
reference voltage. The UC3848 also have soft-start function avoiding
overshoot, and controlled driver output rise edge time tR for low EMI.
 FEATURES
* Low startup and operation current
* 68kHz switching frequency
* Max duty cycle 70%
* Power-saving mode for low power
* Under voltage lockout with hysteresis
* Over temperature protection
* Overload protection
* Over voltage protection
* Leading edge blanking
* Soft start
 ORDERING INFORMATION
Ordering Number
Normal
Lead Free Plating
UC3848-D08-T
UC3848L-D08-T
UC3848-S08-R
UC3848L-S08-R
UC3848-S08-T
UC3848L-S08-T
Package
DIP-8
SOP-8
SOP-8
Packing
Tube
Tape Reel
Tube
www.unisonic.com.tw
Copyright © 2008 Unisonic Technologies Co., Ltd
1 of 12
QW-R103-033.C
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