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Datenblatt-Suchmaschine für elektronische Bauteile |
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Datenblatt-Suchmaschine für elektronische Bauteile |
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ISL81601 Datenblatt(PDF) 40 Page - Renesas Technology Corp |
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ISL81601 Datenblatt(HTML) 40 Page - Renesas Technology Corp |
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40 / 54 page  FN9299 Rev.3.1 Page 40 of 53 May 27, 2021 ISL81601 5. Functional Description Figure 54 shows the connections between the two paralleled converters. Two external operational amplifiers (op amps) are added for active current sharing in each converter. The first op amp, U2B in Converter 1 or U4B in Converter 2, is a buffer to send the local output current signal from the IMON_OUT pin to the current sharing circuit. The buffer output is connected to the iSh bus using R28 in Converter 1 and R61 in Converter 2 to create the reference signal. The voltage on the iSh bus, ViSh, can be calculated using Equation 16. where VIMON_OUT1 is the Converter 1 IMON_OUT pin voltage and VIMON_OUT2 is the Converter 2 IMON_OUT pin voltage. The second op amp, U2A in Converter 1 or U4A in Converter 2 is a differential op amp to feed the current error signal to the IC FB_OUT pin. The differential input signal is equal to VIMON_OUT1 - ViSh for U2A and Figure 54. ISL81601DEMO1Z Current Sharing Circuit VIN GND VOUT GND C39 10u R11 43.2k C41 820p C29 1n R64 1M R47 196k R31 10k R30 100k J3 1 2 3 4 U4A ISL28213 2 1 3 R3 1M C40 10n R1 1.5m C27 100p C37 10u R19 100k C11 1n Q5 R43 43.2k R50 499k C21 100n R29 1M R54 1 R20 1 R58 10k C14 820p R56 1M D3 S110FA D5 S110FA R6 43.2k C16 0.47u C47 10n J4 1 2 3 4 D2 S110FA R37 1.5m C48 10n C7 47n C50 100n R62 10k R49 2.2 R46 15k C38 1n C36 0.47u Q3 R10 43.2k R55 8.45k L2 15u R57 10k Q2 R48 2.7k R39 43.2k R4 62k R15 196k Q4 R41 1 R22 8.45k D1 4V7 D6 S110FA U2B ISL28213 6 5 7 C34 47n C51 100p R40 1 C6 1n R38 5.1k C12 10u R18 499k R13 15k R7 5.1k D4 4V7 R9 1 C33 1n L1 15u Q6 C45 22n Q7 Q1 C18 220p R42 43.2k R12 2.2 R8 1 R51 100k R34 10 Q8 J1 1 2 3 4 R65 100k R63 1M C17 22n R2 10 R27 10k C2 1n R53 1 C13 10n C15 33n R35 1M U4B ISL28213 6 5 7 R14 15k R61 10k C46 220p R23 1M C10 10u R24 10k U2A ISL28213 2 1 3 U3 ISL81601 BSTEN 1 FB_IN 2 VCC5V 3 NC 4 RT/SYNC 5 PLL_COMP 6 CLKOUT/DITHER 7 SS/TRK 8 PHASE2 17 BOOT2 18 LG2/OC_MODE 19 VCC8V 20 PGND 21 LG1/PWM_MODE 22 BOOT1 23 PHASE1 24 J2 1 2 3 4 C20 10n R45 15k C19 10n R21 1 C43 0.47u C9 0.47u R17 2.2 R28 10k R44 2.2 U1 ISL81601 BSTEN 1 FB_IN 2 VCC5V 3 NC 4 RT/SYNC 5 PLL_COMP 6 CLKOUT/DITHER 7 SS/TRK 8 PHASE2 17 BOOT2 18 LG2/OC_MODE 19 VCC8V 20 PGND 21 LG1/PWM_MODE 22 BOOT1 23 PHASE1 24 R5 1.5m R36 62k C42 33n R16 2.7k R32 1M R33 1.5m vcc8-1 vcc8-1 vcc5-1 vcc5-1 comp vcc8-1 VCC5-1 iSh iSh vcc8-2 vcc8-2 vcc5-2 VOUT VCC5-2 VIN en vcc8-2 VIN VOUT bsten vcc5-2 vcc5-1 clken clken besten clk ss ss en en clk ov ov vcc5-2 (EQ. 16) ViSh VIMON_OUT1 VIMON_OUT2 + 2 = |
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