Switching step-down 2A lithium battery charging chip-TP5000

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Switching step-down 2A lithium battery charging chip-TP5000 [Copy link]

TP5000 Switching Buck 2A Li-ion Battery Charging IC

Overview:

TP5000 is a switch step-down single-cell manganese lithium battery/lithium iron phosphate battery charging management chip. Its QFN-16 ultra-small package and simple peripheral circuit make TP5000 very suitable for high-current charging management applications of portable devices. At the same time, TP5000 has input overcurrent, undervoltage protection, chip overtemperature protection, short circuit protection, and battery temperature monitoring. TP5000 has a wide input voltage, and the battery charging is divided into three stages: trickle pre-charge, constant current, and constant voltage. The trickle pre-charge current and constant current charging current are adjusted by external resistors, and the maximum charging current is 2A. TP5000 uses a switching working mode with a frequency of 800kHz, which allows it to use smaller peripheral devices and still maintain a small heat generation during high-current charging. TP5000 has built-in power PMOSFET and anti-backflow circuit, so there is no need for peripheral protection such as anti-backflow Schottky diode. The constant current function of TP5000 can also be used for 2 strings of lithium batteries or 4 strings of dry batteries input, constant current drive 0.5-7W white light LED.

characteristic:

• Single 4.2V manganese lithium or 3.6V lithium iron phosphate battery charging
• Built-in power MOSFET, switch-type working mode, low device heat generation, simple periphery
• Programmable charging current, 0.1A--2A
• Programmable precharge current, 10%--100%
• No need for external Schottky diode to prevent backflow
• Wide operating voltage, up to 9V
• Two LED charging status indicators
• Chip temperature protection, over current protection, under voltage protection
• Battery temperature protection, battery reverse connection shutdown, short circuit protection
• Switching frequency 800KHz, available inductance 2.2uH-10uH
• Automatic recharge function
• Less than 1% charging voltage control accuracy
• Trickle current, constant current and constant voltage three-stage charging to protect the battery
• Adopt QFN16 4mm*4mm ultra-small package

Absolute Maximum Ratings:

• Input supply voltage (VIN): 10V
• BAT：-4.2V～9V
• BAT short circuit duration: continuous
• Maximum junction temperature: 145°C
• Working environment temperature range: -40℃～85℃
• Storage temperature range: -65℃～125℃
• Pin temperature (soldering time 10 seconds): 260℃

application:

Portable devices, various chargers

Smartphones, PDAs, mobile cellular phones

MP4, MP5 players, tablets

Mining lamp

electrical tools

White LED Driver