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TC28C46 数据表(PDF) 6 Page - TelCom Semiconductor, Inc |
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TC28C46 数据表(HTML) 6 Page - TelCom Semiconductor, Inc |
6 / 10 page 4-106 TELCOM SEMICONDUCTOR, INC. Figure 1. R1 and R2 Set Maximum Peak Output Current Figure 2. Resistive Sensing 4 3 3 CURRENT- SENSE AMPLIFIER C R* (A) Ground Reference *OPTIONAL RC FILTER I I 4 3 TCx8C46 VOUT RS (B) Above-Ground Resistive Sensing TCx8C46 RS 3 CURRENT- SENSE AMPLIFIER × × + – + – TC18C46 TC28C46 TC38C46 SWITCH CURRENT 3 CURRENT-SENSE × 0.65V – + 4 3 7 5 6 VDD 100 µA V1 ERROR AMPLIFIER POSITIVE FEEDBACK Q2 350mV Q3 SHUTDOWN COMPARATOR 350mV 6k Ω Q4 FROM UNDERVOLTAGE LOCKOUT 10 PWM LATCH S S R Q LOCK-UP AMPLIFIER I L 3.5k Ω Q1 PWM COMPARATOR "A" = 1 OUTPUT OFF (LOW) VREF 5.1V 2 V1 R2 16 LIMIT BUFFER AMPLIFIER RS R1 AMPLIFIER 1 + – + – + – + – – + + – CMOS CURRENT MODE PWM CONTROLLERS TC18C46 TC28C46 TC38C46 |
类似零件编号 - TC28C46 |
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类似说明 - TC28C46 |
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