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U3848 Datasheet Preview

U3848 Datasheet

HIGH PERFORMANCE CURRENT MODE PWM CONTROLLERS

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U3848 pdf
UNISONIC TECHNOLOGIES CO., LTD
U3848/A/B/C
LINEAR INTEGRATED CIRCUIT
HIGH PERFORMANCE
CURRENT MODE PWM
CONTROLLERS
DESCRIPTION
The UTC U3848/A/B/C 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. Its frequency may be
defined by user through resistor RT to external ground. UVLO
featuring typical start-up current 20µA, and VCC(ON) 12.6V, VCC(OFF)
8.1 . Lower typical operation current Icc 3.7mA at inactive output.
The output stage, suitable for driving N-Channel MOSFETs, can
operate to duty cycles approach 70%. The U3848/A/B/C are fully
pin-to-pin compatible with UC3842. But pin RT only connected a
resistor to ground to decide switch frequency, and pin FB with an
4kpull up resistor to internal reference voltage. The U3848/A/B/C
also have soft-start function avoiding overshoot, and controlled
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driver output rise edge time tR for low EMI.
FEATURES
* Low startup and operation current
* User defined switching frequency(Norm is 70kHz)
* 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
Order Number
Normal
Lead Free Plating
U3848-D08-T
U3848L-D08-T
U3848-S08-R
U3848L-S08-R
U3848-S08-T
U3848L-S08-T
U3848A-D08-T
U3848AL-D08-T
U3848A-S08-R
U3848AL-S08-R
U3848A-S08-T
U3848AL-S08-T
U3848B-D08-T
U3848BL-D08-T
U3848B-S08-R
U3848BL-S08-R
U3848B-S08-T
U3848BL-S08-T
U3848C-D08-T
U3848CL-D08-T
U3848C-S08-R
U3848CL-S08-R
U3848C-S08-T
U3848CL-S08-T
Package
DIP-8
SOP-8
SOP-8
DIP-8
SOP-8
SOP-8
DIP-8
SOP-8
SOP-8
DIP-8
SOP-8
SOP-8
www.unisonic.com.tw
Copyright © 2005 Unisonic Technologies Co., Ltd
DIP-8
SOP -8
*Pb-free plating product number:
U3848L/U3848AL/U3848BL/U3848CL
Packing
Tube
Tape Reel
Tube
Tube
Tape Reel
Tube
Tube
Tape Reel
Tube
Tube
Tape Reel
Tube
1 of 13
QW-R103-033.B



UTC
UTC

U3848 Datasheet Preview

U3848 Datasheet

HIGH PERFORMANCE CURRENT MODE PWM CONTROLLERS

No Preview Available !

U3848 pdf
U3848/A/B/C
ORDERING INFORMATION(Cont.)
U3848L-D08-T
(1)Packing Type
(2)Package Type
(3)Lead Plating
LINEAR INTEGRATED CIRCUIT
(1) R: Tape Reel, T: Tube
(2) D08: DIP-8, S08: SOP-8
(3) L: Lead Free Plating, Blank: Pb/Sn
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
2 of 13
QW-R103-033,B


Part Number U3848
Description HIGH PERFORMANCE CURRENT MODE PWM CONTROLLERS
Maker UTC
Total Page 13 Pages
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