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U6084B PDF Datasheet ( 特性, スペック, ピン接続図 )

部品番号 U6084B
部品説明 PWM Power Control with Automatic Duty-cycle Reduction
メーカ ATMEL Corporation
ロゴ ATMEL Corporation ロゴ 



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U6084B Datasheet, U6084B PDF,ピン配置, 機能
Features
Pulse-width Modulation up to 2 kHz Clock Frequency
Protection against Short-circuit, Load-dump Overvoltage and Reverse VS
Duty-cycle 0 to 100% Continuously
Output Stage for Power MOSFET
Interference and Damage Protection According to VDE 0839 and ISO/TR 7637/1
Charge-pump Noise Suppressed
Ground-wire Breakage Protection
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.
Figure 1. Block Diagram with External Circuit
VS
16
9
Short circuit
latch monitoring
5
6
C1 47 k
RC oscillator
Control input
3
C5
11
Current monitoring
+ short circuit detection
12
PWM
Logic
Charge 13
pump
14
Output
C2
Duty cycle
range
0-100%
Duty cycle
reduction
Voltage
monitoring
Enable/
disable
4 12
Rsh
VBatt
C3
47 nF
PWM Power
Control with
Automatic
Duty-cycle
Reduction
U6084B
150
R3
Ground
Rev. 4677B–AUTO–02/04

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