u6084b ATMEL Corporation, u6084b Datasheet
u6084b
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u6084b Summary of contents
Page 1
... 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 ...
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... Pin Configuration Figure 2-1. Table 2-1. Pin U6084B 2 Pinning SO16 GND 1 EN/DIS REDUCT OSC Pin Description Symbol Function GND IC ground EN/DIS Enable/disable VI Control input (duty cycle) REDUCT Duty cycle reduction NC Attenuation ...
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... µA, the controlled slope is Batt 4 osc 470 pF ----------------- - = 12V 141 µs 40 µA connected to pin 5 damps oscillation tendencies. 4 Function Disable Enable and R (Figure 7-1 on page 9 and ground GND (V 16.5V). Batt Batt 9, the set duty cycle is reduced to (Figure 7-1 on page U6084B = 12.5V to 16V. Batt 9). 3 ...
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... For a duty cycle of less than 100%, the oscillator frequency follows ---------------------------------------------------------------------------------------------------------- - 2 where ------------------------------------------------------------------------------------------------------------------------- - 2 A selection of different values 2000Hz. U6084B charged with a constant current, I, until the upper switching threshold thus discharged by the current, I, until the lower switching – ...
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... mV), the duty cycle charged by a current source of 20 µ reached. Renewed switching on T11 dis is discharged 100 mV. Owing to the difference V 13 U6084B – The ch dis , ensures that capaci- to typically 0.7V. dis – mV, cur (bootstrapping). 3 ...
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... A hysteresis ensures that the FET is switched on again at approximately V 3.11.2 Overvoltage Detection • Stage 1 – If overvoltages of V • Stage 2 – U6084B Batt > 20V (typically) occur, the external transistor is switched off Batt and switched on again at V < 18.5V (hysteresis). ...
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... V 85 100 – 9.5 9.8 T11 dis 150 sat 280 400 13 U6084B Unit °C °C °C Unit K/W Unit 6 27.0 V 5.6 V 6.0 21.7 V 20.3 32.5 V 26.5 21.5 V 120 mV 105 10.1 V µA µ 350 mV ...
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... Current Duty Cycle Reduction Z-voltage Oscillator Frequency Threshold cycle Upper Lower Oscillator current Frequency tolerance Note: 1. Reference point is battery ground U6084B 8 1). All other values refer to pin GND (pin 1). Test Conditions (Whichever is lower) Pin 14 Low level V = 16.5V 110°C, ...
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... Application Figure 7-1. Application 4677C–AUTO–09/05 U6084B 9 ...
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... Extended Type Number U6084B-MFPG3Y 9. Package Information SO16 Package SO16 Dimensions 10. Revision History Please note that the following page numbers referred to in this section refer to the specific revision mentioned, not to this document. Revision No. 4677B-AUTO-02/03 4677C-AUTO-08/05 U6084B 10 Package SO16 10.0 9.85 0.4 1.27 8. History Block Diagram on Page 1 changed New heading rows at Table “ ...
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... Atmel products are not suitable for, and shall not be used in, automotive applications. Atmel’s products are not intended, authorized, or warranted for use as components in applications intended to support or sustain life. © Atmel Corporation 2005. All rights reserved. Atmel marks or trademarks of Atmel Corporation or its subsidiaries. Other terms and product names may be trademarks of others. Atmel Operations Memory ...