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CA3292AM Datasheet(PDF) 2 Page - Intersil Corporation |
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CA3292AM Datasheet(HTML) 2 Page - Intersil Corporation |
2 / 10 page 2 Block Diagram of the CA3272A Block Diagram of the CA3292A (1 of 4 Outputs Shown with Expanded Fault Logic) NOTE: The CA3292A is identical to the CA3272A except for the collector-to-base Zener diode on each low side power output driver (shown here as ZA). The Zener diode clamp is used as an over- voltage clamp to protect the output when switching inductive loads. When the output voltage exceeds the Zener threshold, QA conducts to suppress further increase in output voltage. The fault sense and fault flag logic circuits are the same in the CA3272A and CA3292A. F TLIM ILIM OUT A QA 0.02 Ω F TLIM ILIM OUT D FAULT IN A IN B IN C IN D ENABLE VCC QD 0.02 Ω F TLIM ILIM OUT C QC 0.02 Ω F TLIM ILIM OUT B QB 0.02 Ω TRUTH TABLE ENABLE IN OUT HH L HLH LX H H = High, L = Low, X = Don’t Care ILIM TLIM FAULT INPUT FROM B, C, D FAULT FLAG LOGIC FAULT SENSE CHANNEL A 4V ZA QA OUT A FAULT QF 0.02 Ω CHANNEL A 1 OF 4 OUTPUTS IN A ENABLE ENABLE LINE TO B, C AND D INPUTS AND FAULT OUTPUT CHANNELS CA3272A, CA3292A |
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