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Numéro de référence | U6084B-FP | ||
Description | PWM Power Control with Automatic Duty-cycle Reduction | ||
Fabricant | ATMEL Corporation | ||
Logo | |||
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 kΩ
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 Ω
R3
Ground
Rev. 4677B–AUTO–02/04
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Pages | Pages 10 | ||
Télécharger | [ U6084B-FP ] |
No | Description détaillée | Fabricant |
U6084B-FP | PWM Power Control with Automatic Duty-cycle Reduction | ATMEL Corporation |
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