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LTC4059A Datasheet(PDF) 9 Page - Linear Technology |
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LTC4059A Datasheet(HTML) 9 Page - Linear Technology |
9 / 16 page 9 LTC4065/LTC4065A 4065fb SI PLIFIED BLOCK DIAGRA S Figure 1b. LTC4065A Block Diagram – + – + –+ –+ 2 + MP M2 ×1 M1 ×1000 VCC VCC R1 R2 ENABLE 4V R3 R4 R5 2.9V CHRG 6 PROG 1 GND 4056 F01b RPROG BAT 1V PROG C/10 C2 C3 0.1V 1.2V VBAT + 80mV 3.6V 0.1V D2 D3 D1 TDIE 115 °C 1.2V REF CA MA LOBAT – + C1 VA 5 ACPR 3 4 BAT LOGIC COUNTER OSCILLATOR SHUTDOWN CHARGE CONTROL – + TA OPERATIO The LTC4065 is a linear battery charger designed primarily for charging single cell lithium-ion batteries. Featuring an internal P-channel power MOSFET, the charger uses a constant-current/constant-voltage charge algorithm with programmable current. Charge current can be programmed up to 750mA with a final float voltage accuracy of ±0.6%. The CHRG open-drain status output indicates if C/10 has been reached. No blocking diode or external sense resistor is required; thus, the basic charger circuit requires only two external components. The ACPR pin (LTC4065A) monitors the status of the input voltage with an open-drain output. An internal termination timer and trickle charge low-battery conditioning adhere to battery manufacturer safety guidelines. Furthermore, the LTC4065 is capable of operating from a USB power source. An internal thermal limit reduces the programmed charge current if the die temperature attempts to rise above a preset value of approximately 115 °C. This feature protects the LTC4065 from excessive temperature and allows the user to push the limits of the power handling capability of a given circuit board without risk of damaging the LTC4065 or external components. Another benefit of the LTC4065 thermal limit is that charge current can be set according to |
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