Datasheet > U6084B_05

U6084B_05

更新时间： 2024-01-15 15:14:13

品牌	Logo	应用领域
爱特美尔 - ATMEL		功率控制
页数	文件大小	规格书
11页	234K
描述
PWM Power Control with Automatic Duty-cycle Reduction

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U6084B_05 数据手册

Features

•

Pulse-width Modulation up to 2-kHz Clock Frequency

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

Duty Cycle 0% to 100% Continuously

Output Stage for Power MOSFET

Interference and Damage Protection According to VDE 0839 and

ISO/TR 7637/1

PWM Power

Control with

Automatic

Duty-cycle

Reduction

•

Charge-pump Noise Suppressed

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.

U6084B

Figure 1-1. Block Diagram with External Circuit

V_Batt

C₅

V_S

R_sh

Short circuit

latch monitoring

Current monitoring

+ short circuit detection

Charge

pump

RC oscillator

C₃

47 nF

PWM

Logic

C₁

47 kΩ

Control input

Output

Duty cycle

range

0-100%

C₂

Duty cycle

reduction

Voltage

monitoring

Enable/

disable

R₃

150 Ω

Ground

Rev. 4677C–AUTO–09/05

12 3 4 5 6 7...11

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