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MAX16823EVKIT Arkusz danych(PDF) 4 Page - Maxim Integrated Products |
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MAX16823EVKIT Arkusz danych(HTML) 4 Page - Maxim Integrated Products |
4 / 6 page Input-Voltage Consideration For proper operation, the EV kit’s minimum input volt- age must always be: VIN(MIN) ≥ VFT(MAX) + ΔVDO + VCS(MAX) where VFT(MAX) is the total forward voltage of all series- connected LEDs, ΔVDO is the MAX16823 dropout volt- age from IN to OUT_, and VCS(MAX) is the regulated current-sense voltage. The EV kit can operate below the minimum VIN(MIN) voltage; however, the output current may not meet the full regulation specification. Power Dissipation Thermal shutdown turns the device off if power dissipa- tion in the MAX16823 IC causes the junction tempera- ture to reach +155°C (typ). The MAX16823 EV kit is configured for operation between the 6.5V to 16V range while powering the on-board LEDs. When configuring the MAX16823 EV kit for other configurations, total power dissipation on the PCB should be considered to prevent thermal shutdown. Verify that components Q1 and R5 power-dissipation ratings are not exceeded when operating external LEDs at OUT_3. MAX16823 Evaluation Kit 4 _______________________________________________________________________________________ JU7 R4 4.02 Ω 1% OUT1 CS1 JU6 JU5 JU4 R3 4.02 Ω 1% C1 OPEN C2 0.1 μF 50V R6 10k Ω OUT2 CS2 D1 D2 D3 R2 4.02 Ω 1% CS_3 OUT_3 Q1 2 3 1 2 1 3 R5 0.4 Ω 1% R1 OPEN OUT3 GND CS3 IN GND LEDGOOD OUT2 CS2 OUT1 LEDGOOD REG DIM1 DIM2 DIM3 LGC CS1 IN IN IN MAX16823 U1 567 14 11 15 10 4 9 1 2 3 8 12 16 13 TP1 R7 0 Ω JU1 DIM1 2 1 3 JU2 DIM2 2 1 3 JU3 DIM3 GND 2 1 3 D4 D5 D6 D7 D8 D9 Figure 1. MAX16823 EV Kit Schematic |
Podobny numer części - MAX16823EVKIT |
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Podobny opis - MAX16823EVKIT |
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