U6084B_05 Datasheet

IC型號(hào)：
U6084B_05
PDF描述：
PWM Power Control with Automatic Duty-cycle Reduction
文件大?。?/label>
234.10KB
PDF頁數(shù)：
11頁
芯片廠家：
ATMEL

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Features

鈥?/div>

Pulse-width Modulation up to 2-kHz Clock Frequency

Protection Against Short-circuit, Load-dump Overvoltage and Reverse V

Duty Cycle 0% to 100% Continuously

Output Stage for Power MOSFET

Interference and Damage Protection According to VDE 0839 and

ISO/TR 7637/1

鈥?/div>

Charge-pump Noise Suppressed

鈥?/div>

Ground-wire Breakage Protection

1. Description

The U6084B is a PWM-IC with bipolar technology designed for the control of an

N-channel power MOSFET used as a high-side switch. The IC is ideal for use in the

brightness control (dimming) of lamps such as in dashboard applications. For constant

brightness, the preselected duty cycle can be reduced automatically as a function of

the supply voltage.

PWM Power

Control with

Automatic

Duty-cycle

Reduction

U6084B

Figure 1-1.

Block Diagram with External Circuit

Short circuit

latch monitoring

RC oscillator

Charge 13

pump

PWM

Logic

Control input

Output

47 nF

Current monitoring

+ short circuit detection

Batt

47 k鈩?/div>

Duty cycle

range

0-100%

Duty cycle

reduction

Voltage

monitoring

Enable/

disable

150

鈩?/div>

Ground

Rev. 4677C鈥揂UTO鈥?9/05

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