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PDF UC3842G Data sheet ( Hoja de datos )
| Número de pieza | UC3842G | |
| Descripción | HIGH PERFORMANCE CURRENT MODE CONTROLLER | |
| Fabricantes | Unisonic Technologies | |
| Logotipo |  |
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UNISONIC TECHNOLOGIES CO., LTD
UC3842G
LINEAR INTEGRATED CIRCUIT
HIGH PERFORMANCE
CURRENT MODE
CONTROLLER
■ DESCRIPTION
The UTC UC3842G of high performance current mode
controller is specifically designed for off-line and DC-to-DC
converter applications offering the designer a cost effective
solution with minimal external components. This integrated
circuit features approximately 40μA start up current, a precision
reference trimmed the error amplifier input. Also included are
protective features consisting of input and reference
undervoltage lockouts each with hysteresis, cycle-by-cycle
current limiting, and so on.
■ FEATURES
* Low startup and operating current
* User defined switching frequency(Norm is 52kHz)
* Power-saving mode for low power
* Under voltage lockout with hysteresis
* Over voltage protection
* Latching PWM for Cycle-By-Cycle current limiting
* Internally trimmed reference with undervoltage lockout
ORDERING INFORMATION
Ordering Number
Lead Free
Halogen Free
UC3842GL-D08-T
UC3842GP-D08-T
- UC3842GP-S08-R
Package
DIP-8
SOP-8
Packing
Tube
Tape Reel
MARKING
DIP-8
SOP-8
www.unisonic.com.tw
Copyright © 2015 Unisonic Technologies Co., Ltd
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QW-R103-036.D
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UC3842G
OPEN-LOOP TEST CIRCUIT
LINEAR INTEGRATED CIRCUIT
High peak current associated with capacity loads necessitate careful grounding techniques. Timing and bypass
capacitors should be connected close to pin5 in single point GND.
UNDER-VOLTAGE LOCKOUT
During Under-Voltage Lockout, the output driver is biased to a high impedance state. Pin 6 should be shunt to
GND with a bleeder resistor to prevent activing the power switch with output leakage currents.
ERROR AMPLIFIER CONFIGURATION
Error amplifier can source or sink up to 0.5mA
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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QW-R103-036.D
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| Páginas | Total 7 Páginas | |
| PDF Descargar | [ Datasheet UC3842G.PDF ] | |
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