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MCP73833T-AMI bảng dữ liệu(PDF) 9 Page - Microchip Technology |
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MCP73833T-AMI bảng dữ liệu(HTML) 9 Page - Microchip Technology |
9 / 26 page © 2006 Microchip Technology Inc. DS22005A-page 9 MCP73833/4 3.0 PIN DESCRIPTIONS Descriptions of the pins are listed in Table 3-1. TABLE 3-1: PIN FUNCTION TABLE 3.1 Battery Management Input Supply (VDD) A supply voltage of [VREG (typ.) + 0.3V] to 6V is recommended. Bypass to VSS with a minimum of 1 µF. 3.2 Charge Status Outputs (STAT1, STAT2) STAT1 and STAT2 are open-drain logic outputs for con- nection to a LED for charge status indication. Alternatively, a pull-up resistor can be applied for interfacing to a host microcontroller. 3.3 Battery Management 0V Reference (VSS) Connect to negative terminal of battery and input supply. 3.4 Current Regulation Set (PROG) Preconditioning, fast charge, and termination currents are scaled by placing a resistor from PROG to VSS. The charge management controller can be disabled by allowing the PROG input to float. 3.5 Power Good Indication (PG) MCP73833 Only The power good (PG) option is a pseudo open-drain output. The PG output can sink current, but not source current. However, there is a diode path back to the input, and, as such, the PG output should only be pulled up to the input. The PG output is low whenever the input to the MCP73833 is above the UVLO threshold and greater than the battery voltage. 3.6 Timer Enable Input (TE) MCP73834 Only The timer enable (TE) input option is used to enable or disable the internal timer. A low signal on this pin enables the internal timer and a high signal disables the internal timer. The TE input can be used to disable the timer when the charger is supplying current to charge the battery and power the system load. The TE input is compatible with 1.8V logic. 3.7 Thermistor Input (THERM) An internal 50 µA current source provides the bias for most common 10 k Ω negative-temperature coefficient thermistors (NTC). The MCP73833/4 compares the voltage at the THERM pin to factory set thersholds of 1.20V and 0.25V, typically. 3.8 Battery Charge Control Output (VBAT) Connect to positive terminal of battery. Drain terminal of internal P-channel MOSFET pass transistor. Bypass to VSS with a minimum of 1 µF to ensure loop stability when the battery is disconnected. Pin No. Symbol Function DFN MSOP 11 VDD Battery Management Input Supply 22 VDD Battery Management Input Supply 3 3 STAT1 Charge Status Output 4 4 STAT2 Charge Status Output 55 VSS Battery Management 0V Reference 6 6 PROG Current Regulation Set and Charge Control Enable 77 PG, TE MCP73833: Power Good output, MCP73834: Timer Enable input 8 8 THERM Thermistor input 99 VBAT Battery Charge Control Output 10 10 VBAT Battery Charge Control Output |
Số phần tương tự - MCP73833T-AMI |
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Mô tả tương tự - MCP73833T-AMI |
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