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參數(shù)資料
| 型號： | TPS65200YFFT |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 電源管理 |
| 英文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, BGA36 |
| 封裝： | 2.80 X 2.60 MM, 0.40 MM PITCH, GREEN, DSBGA-36 |
| 文件頁數(shù)： | 27/59頁 |
| 文件大?。?/td> | 2424K |
| 代理商： | TPS65200YFFT |
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www.ti.com
SLVSA48 – APRIL 2010
The TPS65200 monitors the charging current during the voltage regulation phase. Once the termination
threshold, ITERM, is detected and the battery voltage is above the recharge threshold, the TPS65200 terminates
charge. The termination current level is programmable and charge termination is disabled by default. To enable
the charge current termination, the host can set the charge termination bit TERM_EN of CONFIG_C register to 1.
Refer to I2C section for details.
A new charge cycle is initiated when one of the following events occur:
VBUS is power-cycled.
CH_EN[1:0] = 11b and the battery voltage drops below the recharge threshold (TERM_EN = 1).
The RESET bit is set (host controlled).
The device is in CHARGE DONE state (see Figure 46) and the TERM_EN bit is set from 1 to 0.
Thermal Regulation and Protection
During the charging process, to prevent overheating of the chip, TPS65200 monitors the junction temperature,
TJ, of the die and begins to taper down the charge current once TJ reaches the thermal regulation threshold, TCF.
The charge current will be reduced to zero when the junction temperature increases about 10°C above TCF. At
any state, if TJ exceeds TSHTDWN, TPS65200 will suspend charging and enter HiZ state. Charging will resume
after TJ falls 10°C below TSHTDWN.
Safety Timer in Charge and Boost Mode (CH32MI, BST32SI)
The TPS65200 charger hosts a safety timer that stops any boost or charging action if host control is lost. The
timer is started when the CH_EN[1:0] bits are set to anything different from 00 and is continuously reset by any
valid I2C command. If the timer exceeds 32 s and boost mode is enabled (CH_EN[1:0] = 01b), the boost is
disabled, CH_EN[1:0] is set to 00b, boost time-out fault is indicated in the INT2 register, and an interrupt is
issued. Similarly, once the timer exceeds 32 minutes and the charger is enabled (CH_EN[1:0] = 10b or 11b), the
charger is disabled, CH_EN[1:0] is set to 00b, charger time-out fault is indicated in INT2 register and an interrupt
is issued. Time-out faults affect CH_EN[1:0] bits only and not charger parameters. The safety timer flow chart is
shown in Figure 54.
Copyright 2010, Texas Instruments Incorporated
33
Product Folder Link(s): TPS65200
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