MC33340P

Product Summary

The MC33340P is a monolithic control IC. The device is specifically designed as fast charge controllers for Nickel Cadmium (NiCd) and Nickel Metal Hydride (NiMH) batteries. The MC33340P features negative slope voltage detection as the primary means for fast charge termination. Accurate detection is ensured by an output that momentarily interrupts the charge current for precise voltage sampling. An additional secondary backup termination method can be selected that consists of either a programmable time or temperature limit. Protective features of the MC33340P include battery over and undervoltage detection, latched over temperature detection, and power supply input undervoltage lockout with hysteresis. Fast charge holdoff time is the only difference between the MC33340 and the MC33342. The MC33340P has a typical holdoff time of 177 seconds.

Parametrics

MC33340P absolute maximum ratings: (1)Power Supply Voltage (Pin 8), VCC: 18 V; (2)Input Voltage Range, Time/Temperature Select (Pins 5, 6, 7), VIR(t/T): -1.0 to VCC; Battery Sense, (Pin 1), VIR(sen): -1.0 to VCC + 0.6V or -1.0 to 10V; (3)Vsen Gate Output (Pin 2), Voltage, VO(gate): 20V; Current, IO(gate): 50mA; (4)Fast/Trickle Output (Pin 3) Voltage, VO(F/T): 20V; Current, IO(F/T): 50mA; (5)Thermal Resistance, Junction-to-Air, RJA: 100℃/W; (6)Operating Junction Temperature, TJ: +150℃; (7)Operating Ambient Temperature, TA: -25 to +85℃; (8)Storage Temperature, Tstg: -55 to +150℃.

Features

MC33340P features: (1)Negative Slope Voltage Detection with 4.0 mV Sensitivity; (2)Accurate Zero Current Battery Voltage Sensing; (3)High Noise Immunity with Synchronous VFC/Logic; (4)Programmable 1 to 4 Hour Fast Charge Time Limit; (5)Programmable Over/Undertemperature Detection; (6)Battery Over and Undervoltage Fast Charge Protection; (7)Power Supply Input Undervoltage Lockout with Hysteresis; (8)Operating Voltage Range of 3.25 V to 18 V; (9)177 seconds Fast Change Holdoff Time; (10)Pb-Free Packages are Available.

Diagrams