MB39A132

Product Summary

The MB39A132, which is used for charging Li-ion battery, is a synchronous rectification DC/DC converter IC adopting pulse width modification (PWM). It can control charge voltage and charge current separately and supports the N-ch MOS driver. In addition, MB39A132 is suitable for down-conversion. MB39A132 has an AC adapter detection comparator, which is independent of the DC/DC converter control block, and can control the source supplying voltage to the system. MB39A132 supports a wide input voltage range, enables low current consumption in standby mode, and can control the charge voltage and charge current with high precision, which is perfect for the built-in Li-ion battery charger used in devices such as notebook PC. It is used in built-in chargers for notebook PCs, handy terminals, etc.

Parametrics

MB39A132 absolute maximum ratings: (1)Power supply voltage, VVCC VCC pin: -0.3 + 27 V; VVIN VIN pin: -0.3 to + 27 V; (2)CB pin input voltage VCB CB pin: -0.3 to + 32 V; (3)CTL1, CTL2 pin input voltage VCTL CTL1, CTL2 pins: -0.3 to + 27 V; (4)Input voltage VINC -INC1, +INC1 pins: -0.3 to + 27 V; -INC2, +INC2, BATT pins: -0.3 + 20 V; VADJ ADJ1, ADJ2, ADJ3, CELLS pins: -0.3 to VVREF + 0.3 V; VINE -INE1, -INE3 pins: -0.3 to VVREF + 0.3 V; (5)ACIN input voltage VACIN ACIN pin: -0.3 to VVIN V; (6)ACOK pin output voltage VACOK ACOK pin: -0.3 + 27 V; (7)Output current IOUT OUT1, OUT2 pins: -60 to + 60 mA; (8)Storage temperature TSTG: -55 to + 125 ℃.

Features

MB39A132 features: (1)Supports 2/3/4-Cell battery pack; (2)Two built-in constant current control loops; (3)Built-in AC adapter detection function (ACOK pin); (4)Charge voltage setting accuracy: ±0.5%; (5)Charge current control setting can be selected without using any external resistor. (RS = 20 m 2.85 A); Charge current can also be freely set by using the external resistor; (6)Switching frequency can be set by using the external resistor(MB39A132 has a built-in frequency setting capacitor.):100 kHz to 2 MHz; (7)Built-in off time control function; (8)In standby mode (Icc = 6μA Typ), only the AC adapter detection function is in operation; (9)Built-in output stage for N-ch MOS FET synchronous rectification; (10)Built-in charge stop function at low VCC pin voltage; (11)Built-in soft-start function whose setting time can be adjusted; (12)Equipped with the function enabling the independent operation of the AC adapter current detection amplifier; (13)Package: QFN-32.

Diagrams