参数资料
型号: TPS65020RHAR
厂商: TEXAS INSTRUMENTS INC
元件分类: 电源管理
英文描述: 1-CHANNEL POWER SUPPLY MANAGEMENT CKT, PQCC40
封装: GREEN, PLASTIC, QFN-40
文件页数: 35/48页
文件大小: 1182K
代理商: TPS65020RHAR
www.ti.com
APPLICATION INFORMATION
IMPLEMENTING A PUSH-BUTTON ON-OFF FUNCTION USING PB_IN AND PB_OUT
Inputbuffer
JK-flipflop
PB_OUT
PB_IN
nBatt_Fault
PWRFAIL
LOWBAT_SNS
PWRFAIL_SNS
VCC
VCC_Batt
VCC
1V
+
-
+
-
1V
PXA270
TPS65020
SLVS607B – SEPTEMBER 2005 – REVISED JULY 2007
In mobile phone applications, the device must not automatically power up when the battery is inserted. Using
PB_IN and PB_OUT prevents power up. After the main battery is inserted, the PB_OUT open drain output is
low. When this pins is connected with PWRFAIL, the signal is pulled low, preventing the Intel PXA270 start up.
See the latest version of Intels technical specifications about the Intel PXA270 Processor Family for additional
information on the functionality of this chip and possible limitations.
40
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