UC3845L-D08-T 查看數據表（PDF） - Unisonic Technologies

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UC3845L-D08-T

HIGH PERFORMANCE CURRENT MODE PWM CONTROLLERS

Unisonic Technologies 

UNISONIC TECHNOLOGIES CO., LTD

UC3844/45

LINEAR INTEGRATED CIRCUIT

HIGH PERFORMANCE

CURRENT MODE PWM

CONTROLLERS

„ DESCRIPTION

The UTC UC3844/3845 are high performance fixed frequency

current mode controllers that specifically designed for Off-Line and

DC to DC converter applications with minimal external parts count.

The differences between UC3844 and UC3845 are the maximum

duty cycle ranges and under-voltage lockout thresholds. The

UC3844 ideally suited to off-line applications with UVLO thresholds

of 16V(ON) and 10V(OFF), and UC3845 has UVLO thresholds of

8.5V(ON) and 7.6V(OFF) for lower voltage applications.

„ FEATURES

* Operation output switching frequency up to 500 kHz

* Output deadtime adjustable from 50% to 70%

* Automatic feed forward compensation

* Latching PWM for cycle-by-cycle current limiting

* High current totem pole output

* Internally trimmed reference with under voltage lockout

* UVLO with hysteresis

* Low startup and operating current

„ ORDERING INFORMATION

Ordering Number

Lead Free

Halogen Free

UC3844L-D08-T

UC3844G-D08-T

UC3844L-S08-R

UC3844G-S08-R

UC3844L-S08-T

UC3844G-S08-T

UC3845L-D08-T

UC3845G-D08-T

UC3845L-S08-R

UC3845G-S08-R

UC3845L-S08-T

UC3845G-S08-T

Package

DIP-8

SOP-8

SOP-8

DIP-8

SOP-8

SOP-8

Packing

Tube

Tape Reel

Tube

Tube

Tape Reel

Tube

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