STMicroelectronics UC3843BD1 1 PWM Controller, 500 kHz 30V 8-Pin, SO-8

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HK$551.40

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Units
Per unit
Per Tube*
100 - 400HK$5.514HK$551.40
500 - 900HK$5.239HK$523.90
1000 +HK$5.016HK$501.60

*price indicative

RS Stock No.:
151-972
Mfr. Part No.:
UC3843BD1
Manufacturer:
STMicroelectronics
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Brand

STMicroelectronics

Maximum Switching Frequency

500kHz

Product Type

PWM Controller

Start-up Supply Current

0.5mA

Supply Current

17mA

Output Current

1A

Mount Type

Surface

Minimum Supply Voltage

8.5V

Package Type

SO-8

Pin Count

8

Maximum Supply Voltage

30V

Maximum Duty Cycle

100%

Minimum Operating Temperature

-40°C

Maximum Operating Temperature

150°C

Series

UC284

Standards/Approvals

RoHS

Height

1.75mm

Length

5mm

Automotive Standard

No

The STMicroelectronics Controller, it belongs to family of control ICs provides the necessary features to implement off-line or DC to DC fixed frequency current mode control schemes with a minimal external parts count. Internally implemented circuits include a trimmed oscillator for precise DUTY CYCLE CONTROL under voltage lockout featuring start-up current less than 0.5mA, a precision reference trimmed for accuracy at the error amp input, logic to insure latched operation, a PWM comparator which also provides current limit control, and a totem pole output stage designed to source or sink high Peak current.

High current totem pole output

Undervoltage lockout with hysteresis

Low start-up and operating current

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