(China (Mainland))
Product Summary
The mb3887pfv-g-bnd-er is a DC/DC converter IC suitable for down-conversion, using pulse-width (PWM) charging and enabling output voltage to be set to any desired level from one cell to four cells. The mb3887pfv-g-bnd-er can dynamically control the secondary batterys charge current by detecting a voltage drop in an AC adapter in order to keep its power constant (dynamically-controlled charging). The charging method enables quick charging, for example, with the AC adapter during operation of a notebook PC. The mb3887pfv-g-bnd-er provides a broad power supply voltage range and low standby current as well as high efficiency, making it ideal for use as a built-in charging device in products such as notebook PC.
Parametrics
mb3887pfv-g-bnd-er absolute maximum ratings: (1)Power supply voltage VCC VCC, VCC (O)terminal*: 28 V; (2)Output current IOUT: 60 mA; (3)Peak output current IOUT Duty ≤ 5 % (t = 1 / fOSC × Duty): 700 mA; (4)Power dissipation PD Ta ≤ +25 °C: 740mW; (5)Storage temperature TSTG: −55 +125°C.
Features
mb3887pfv-g-bnd-er features: (1)Output voltage setting using external resistor : 1 cell to 4 cells; (2)High efficiency : 96% (VIN = 19 V, Vo = 16.8 V); (3)Wide range of operating supply voltages : 8 V to 25 V; (4)Output voltage setting accuracy : 4.2 V ± 0.74% (Ta = −10 °C to +85 °C , per cell)Charging current accuracy : ±5%; (5)Built-in frequency setting capacitor enables frequency setting using external resistor only Oscillation frequency range : 100 kHz to 500 kHz; (6)Built-in current detection amplifier with wide in-phase input voltage range : 0 V to VCC; (7)In standby mode, leave output voltage setting resistor open to prevent inefficient current loss Built-in standby current function : 0 μA (standard); (8)Built-in soft-start function independent of loads; (9)Built-in totem-pole output stage supporting P-channel MOS FET devices.
Diagrams
