- 您现在的位置：买卖IC网 > PDF目录69521 > TPS65020RHAR (TEXAS INSTRUMENTS INC) 1-CHANNEL POWER SUPPLY MANAGEMENT CKT, PQCC40 PDF资料下载
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： | 13/48页 |
| 文件大小： | 1182K |
| 代理商： | TPS65020RHAR |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页当前第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页第46页第47页第48页
www.ti.com
DETAILED DESCRIPTION
VRTC OUTPUT AND OPERATION WITH OR WITHOUT BACKUP BATTERY
SLVS607B – SEPTEMBER 2005 – REVISED JULY 2007
The VRTC pin is an always-on output, intended to supply up to 20 mA to a permanently required rail. This is the
VCC_BATT rail of the Intel PXA270 Bulverde processor for example.
In applications using a backup battery, the backup voltage can be either directly connected to the TPS65020
VBACKUP pin if a Li-Ion cell is used, or via a boost converter (e.g. TPS61070) if a single NiMH battery is used.
The voltage applied to the VBACKUP pin is fed through a PMOS switch to the VRTC pin. The TPS65020
asserts the RESPWRON signal if VRTC drops below 2.4 V. This, together with 250 mV at 20 mA drop out for
the PMOS switch means that the voltage applied at VBACKUP must be greater than 2.65 V for normal system
operation.
When the voltage at the VSYSIN pin exceeds 2.65 V, the path from VBACKUP to VRTC is cut, and VRTC is
supplied by a similar PMOS switch from the voltage source connected to the VSYSIN input. Typically this is the
VDCDC1 converter but can be any voltage source within the appropriate range.
In systems where no backup battery is used, the VBACKUP pin is connected to GND. In this case, a low power
LDO is enabled, supplied from VCC and capable of delivering 20 mA to the 3 V output. This LDO is disabled if
the voltage at the VSYSIN input exceeds 2.65 V. VRTC is then supplied from the external source connected to
this pin as previously described.
Inside TPS65020 there is a switch (Vmax switch) which selects the higher voltage between VCC and
VBACKUP. This is used as the supply voltage for some basic functions. The functions powered from the output
of the Vmax switch are:
INT output
RESPWRON output
HOT_RESET input
LOW_BATT output
PWRFAIL output
Enable pins for dc-dc converters, LDO1 and LDO2
Undervoltage lockout comparator (UVLO)
Reference system with low frequency timing oscillators
LOW_BATT and PWRFAIL comparators
PB-IN, PB-OUT, the main 1.5-MHz oscillator, and the I2C interface are only powered from VCC.
20
相关PDF资料 |
PDF描述 |
|---|---|
| TPS65021RHAR | 3-CHANNEL POWER SUPPLY SUPPORT CKT, PQCC40 |
| TPS65021RHA | 3-CHANNEL POWER SUPPLY SUPPORT CKT, PQCC40 |
| TPS65021RHAT | 3-CHANNEL POWER SUPPLY SUPPORT CKT, PQCC40 |
| TPS650231RSB | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PQCC40 |
| TPS650231YFFR | 1-CHANNEL POWER SUPPLY SUPPORT CKT, BGA49 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| TPS65020RHARG4 | 功能描述:电池管理 6-Ch Pwr Mgmt IC for Li-Ion Systems RoHS:否 制造商:Texas Instruments 电池类型:Li-Ion 输出电压:5 V 输出电流:4.5 A 工作电源电压:3.9 V to 17 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:VQFN-24 封装:Reel |
| TPS65020RHAT | 功能描述:电池管理 6-Ch Pwr Mgmt IC for Li-Ion Systems RoHS:否 制造商:Texas Instruments 电池类型:Li-Ion 输出电压:5 V 输出电流:4.5 A 工作电源电压:3.9 V to 17 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:VQFN-24 封装:Reel |
| TPS65020RHATG4 | 功能描述:电池管理 6-Ch Pwr Mgmt IC for Li-Ion Systems RoHS:否 制造商:Texas Instruments 电池类型:Li-Ion 输出电压:5 V 输出电流:4.5 A 工作电源电压:3.9 V to 17 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:VQFN-24 封装:Reel |
| TPS65021EVM-110 | 功能描述:电源管理IC开发工具 TPS65021-110 Eval Mod RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
| TPS65021RHAR | 功能描述:电池管理 6-Ch Pwr Mgmt IC for Li-Ion Systems RoHS:否 制造商:Texas Instruments 电池类型:Li-Ion 输出电压:5 V 输出电流:4.5 A 工作电源电压:3.9 V to 17 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:VQFN-24 封装:Reel |
发布紧急采购，3分钟左右您将得到回复。