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參數(shù)資料
| 型號： | TPS65020RHA |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | POWER MANAGEMENT IC FOR LI-ION POWERED SYSTEMS |
| 中文描述： | 電源管理IC鋰離子供電系統(tǒng) |
| 文件頁數(shù)： | 24/44頁 |
| 文件大?。?/td> | 3085K |
| 代理商： | TPS65020RHA |
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SYSTEM RESET + CONTROL SIGNALS
The RESPWRON signal can be used as a global reset for the application. It is an open drain output. The
RESPWRON signal is generated according to the power good comparator of VRTC, and remains low for t
seconds after VRTC has risen above 2.52 V (falling threshold is 2.4 V, 5% hysteresis). t
nrespwron
is set by an
external capacitor at the TRESPWRON pin. 1 nF gives typically 100 ms. RESPWRON is also triggered by the
HOT_RESET input. This input is internally debounced, with a filter time of typically 30 ms.
PB_IN and PB_OUT
Interrupt Management and the INT Pin
TPS65020
SLVS607–SEPTEMBER 2005
DETAILED DESCRIPTION (continued)
Table 2. Control Pins and Status Outputs for DC-DC Converters
PIN NAME
INPUT
OUTPUT
FUNCTION
Defines the default voltage of the VDCDC3 switching converter. DEFDCDC3 = 0 defaults VDCDC3 to
1.3 V, DEFDCDC3 = VCC defaults VDCDC3 to 1.55 V.
Defines the default voltage of the VDCDC2 switching converter. DEFDCDC2 = 0 defaults VDCDC2 to
1.8 V, DEFDCDC2 = VCC defaults VDCDC2 to 2.5 V.
Defines the default voltage of the VDCDC1 switching converter. DEFDCDC1 = 0 defaults VDCDC1 to 3 V,
DEFDCDC1 = VCC defaults VDCDC1 to 3.3 V.
Set DCDC3_EN = 0 to disable and DCDC3_EN = 1 to enable the VDCDC3 converter
Set DCDC2_EN = 0 to disable and DCDC2_EN = 1 to enable the VDCDC2 converter
Set DCDC1_EN = 0 to disable and DCDC1_EN = 1 to enable the VDCDC1 converter
The HOT_RESET pin generates a reset (RESPWRON) for the processor.HOT_RESET does not alter any
TPS65020 settings except the output voltage of VDCDC3. Activating HOT_RESET sets the voltage of
VDCDC3 to its default value defined with the DEFDCDC3 pin. A 1 M
pull-up resistor to VCC is integrated
in TPS65020. HOT_RESET is internally de-bounced by the TPS65020.
RESPWRON is held low when power is initially applied to the TPS65020. The VRTC voltage is monitored:
RESWPRON is low when VRTC < 2.4 V and remains low for a time defined by the external capacitor at the
TRESPWRON pin. RESPWRON can also be forced low by activation of the HOT_RESET pin.
Connect a capacitor here to define the RESET time at the RESPWRON pin. 1 nF typically gives 100 ms.
DEFDCDC3
I
DEFDCDC2
I
DEFDCDC1
I
DCDC3_EN
DCDC2_EN
DCDC1_EN
I
I
I
HOT_RESET
I
RESPWRON
O
TRESPWRON
I
The PWRFAIL and LOW_BAT signals are generated by two voltage detectors using the PWRFAIL_SNS and
LOWBAT_SNS input signals. Each input signal is compared to a 1 V threshold (falling edge) with 5% (50 mV)
hysteresis.
The VDCDC3 converter is reset to its default output voltage defined by the DEFDCDC3 input, when
HOT_RESET is asserted. Other I
2
C registers are not affected. Generally, the VDCDC3 converter is set to its
default voltage with one of these conditions: HOT_RESET active, VRTC lower than its threshold voltage,
undervoltage lockout (UVLO) condition, RESPWRON active, both VDCDC3-converter AND VDCDC1-converter
disabled. In addition, the voltage of VDCDC3 changes to 1xxx0, if the VDCDC1 converter is disabled. Where xxx
is the state before VDCDC1 was disabled.
In the TPS65020 the PB_IN pin is defined as an input. It is active high and debounces the input signal. For
example from a push button, before passing it to a latch associated with PB_OUT (active low). This feature
allows the implementation of a push-button on-off-switch. PB_OUT is actively pulled low per default. See the
application information section.
The INT pin combines the outputs of the PGOOD comparators from each dc-dc converter and LDOs. The INT
pin is used as a POWER_OK pin indicating when all enabled supplies are in regulation. If the PGOODZ register
is read via the serial interface, any active bits are then blocked from the INT output pin.
Interrupts can be masked using the MASK register; default operation is not to mask any interrupts since this
gives the simple POWER_OK function.
24
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| TPS65020RHAR | 功能描述:電池管理 6-Ch Pwr Mgmt IC for Li-Ion Systems RoHS:否 制造商:Texas Instruments 電池類型:Li-Ion 輸出電壓:5 V 輸出電流:4.5 A 工作電源電壓:3.9 V to 17 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:VQFN-24 封裝:Reel |
| TPS65020RHARG4 | 功能描述:電池管理 6-Ch Pwr Mgmt IC for Li-Ion Systems RoHS:否 制造商:Texas Instruments 電池類型:Li-Ion 輸出電壓:5 V 輸出電流:4.5 A 工作電源電壓:3.9 V to 17 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:VQFN-24 封裝:Reel |
| TPS65020RHAT | 功能描述:電池管理 6-Ch Pwr Mgmt IC for Li-Ion Systems RoHS:否 制造商:Texas Instruments 電池類型:Li-Ion 輸出電壓:5 V 輸出電流:4.5 A 工作電源電壓:3.9 V to 17 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:VQFN-24 封裝:Reel |
| TPS65020RHATG4 | 功能描述:電池管理 6-Ch Pwr Mgmt IC for Li-Ion Systems RoHS:否 制造商:Texas Instruments 電池類型:Li-Ion 輸出電壓:5 V 輸出電流:4.5 A 工作電源電壓:3.9 V to 17 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:VQFN-24 封裝:Reel |
| TPS65021EVM-110 | 功能描述:電源管理IC開發(fā)工具 TPS65021-110 Eval Mod RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類型:Battery Management 工具用于評估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
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