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LTC4100EG Datasheet(PDF) 7 Page - Linear Technology |
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LTC4100EG Datasheet(HTML) 7 Page - Linear Technology |
7 / 24 page LTC4100 7 sn4100 4100is BLOCK DIAGRA + – + – + + 1.28V 1.19V WATCHDOG DETECT tON OSCILLATOR DCIN PWM LOGIC S R Q CA1 BUFFERED ITH gm = 1m + – + – ÷5 + – 17mV 100mV gm = 1m gm = 1.5m 1.19V 1.2V CLP SMBus INTERFACE AND CONTROL THERMISTER INTERFACE LIMIT DECODER ICMP IREV 0V VSET BAT CSP IDC ILIM VLIM ITH ACP DCDIV PGND CLN CLP DCIN INFET CHGEN SMBALERT SDA SCL THA THB GND CLP TGATE BGATE EA CL1 5.8V 11-BIT VDAC 10-BIT IDAC 3k 9k – – 12 18 1 3 2 23 24 5 4 6 8 9 16 15 13 14 11 10 19 20 21 22 100 Ω 0.01 µF 0.1 µF VBAT VBAT SW SW Q2 Q3 Q1 RCL 20 µF D1 L1 VIN VIN 7 10 µA VDD RSENSE 20 µF RVLIM RILIM 17 VDD Figure 2. TEST CIRCUIT + – + – EA VDAC 0.6V LT1055 CSP BAT VSET ITH LTC4100 1.19V 4100 TC01 PI FU CTIO S CLN (Pin 23): Negative Input to the Input Current Limiting Circuit Block. If no current limit function is desired, con- nect this pin to CLP. The threshold is set at 100mV below the voltage at the CLP pin. When used to limit supply current, a filter is needed to filter out the switching noise. CLP (Pin 24): Positive Input to the Input Current Limiting Circuit Block. This pin also serves as a power supply for the IC. Bypass to ground with a 1 µF capacitor. V VV V FOR V V x A DCIN V TOL BAT VDAC VDAC VDAC = = = – • .( ) 100 17 56 0 44 0 21 |
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