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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： | 17/48页 |
| 文件大小： | 1182K |
| 代理商： | TPS65020RHAR |
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ACTIVE DISCHARGE WHEN DISABLED
POWER GOOD MONITORING
LOW DROPOUT VOLTAGE REGULATORS
UNDERVOLTAGE LOCKOUT
POWER-UP SEQUENCING
SLVS607B – SEPTEMBER 2005 – REVISED JULY 2007
DETAILED DESCRIPTION (continued)
When the VDCDC1, VDCDC2, and VDCDC3 converters are disabled, due to an UVLO, DCDCx_EN or
OVERTEMP condition, it is possible to actively pull down the outputs. This feature is disabled per default and is
individually enabled via the CON_CTRL2 register in the serial interface. When this feature is enabled, the
VDCDC1, VDCDC2, and VDCDC3 outputs are discharged by a 300
(typical) load which is active as long as
the converters are disabled.
All three step-down converters and both the LDO1 and LDO2 linear regulators have power good comparators.
Each comparator indicates when the relevant output voltage has dropped 10% below its target value with 5%
hysteresis. The outputs of these comparators are available in the PGOODZ register via the serial interface. An
interrupt is generated when any voltage rail drops below the 10% threshold. The comparators are disabled when
the converters are disabled and the relevant PGOODZ register bits indicate that power is good.
The low dropout voltage regulators are designed to operate well with low value ceramic input and output
capacitors. They operate with input voltages down to 1.5 V. The LDOs offer a maximum dropout voltage of
300 mV at rated output current. Each LDO supports a current limit feature. Both LDOs are enabled by the
LDO_EN pin, both LDOs can be disabled or programmed via the serial interface using the REG_CTRL and
LDO_CTRL registers. The LDOs also have reverse conduction prevention. This allows the possibility to connect
external regulators in parallel in systems with a backup battery. The TPS65020 step-down and LDO voltage
regulators automatically power down when the VCC voltage drops below the UVLO threshold or when the
junction temperature rises above 160
°C.
The undervoltage lockout circuit for the five regulators on the TPS65020 prevents the device from malfunctioning
at low-input voltages and from excessive discharge of the battery. It disables the converters and LDOs. The
UVLO circuit monitors the VCC pin, the threshold is set internally to 2.35 V with 5% (120 mV) hysteresis. Note
that when any of the dc-dc converters are running, there is an input current at the VCC pin, which is up to 3 mA
when all three converters are running in PWM mode. This current needs to be taken into consideration if an
external RC filter is used at the VCC pin to remove switching noise from the TPS65020 internal analog circuitry
supply.
The TPS65020 power-up sequencing is designed to be entirely flexible and customer driven. This is achieved by
providing separate enable pins for each switch-mode converter, and a common enable signal for the LDOs. The
relevant control pins are described in Table 2.
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相关代理商/技术参数 |
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| 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 |
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