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参数资料
| 型号： | TPS65023RSB |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 电源管理 |
| 英文描述： | 3-CHANNEL POWER SUPPLY SUPPORT CKT, PQCC40 |
| 封装： | 5 X 5 MM, PLASTIC, QFN-40 |
| 文件页数： | 18/53页 |
| 文件大小： | 1274K |
| 代理商： | TPS65023RSB |
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SLVS670I – JUNE 2006 – REVISED JULY 2010
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 tnrespwron
seconds after VRTC has risen above 2.52 V (falling threshold is 2.4 V, 5% hysteresis). tnrespwron 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.
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 DCDC1 converter is reset to its default output voltage defined by the DEFDCDC1 input, when HOT_RESET
is asserted. Other I2C registers are not affected. Generally, the DCDC1 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, or RESPWRON active.
DEFLDO1 and DEFLDO2
These two pins are used to set the default output voltage of the two 200 mA LDOs. The digital value applied to
the pins is latched during power up and determines the initial output voltage according to Table 3. The voltage of
both LDOs can be changed during operation with the I2C interface as described in the interface description.
Table 3.
DEFLDO2
DEFLDO1
VLDO1
VLDO2
0
1.3 V
3.3 V
0
1
2.8 V
3.3 V
1
0
1.3 V
1.8 V
1
1.8 V
3.3 V
Interrupt Management and the INT Pin
The INT pin combines the outputs of the PGOOD comparators from each dc-dc converter and the LDOs. The
INT pin is used as a POWER_OK pin to indicate when all enabled supplies are in regulation. The INT pin
remains active (low state) during power up as long as all enabled power rails are below their regulation limit.
Once the last enabled power rail is within regulation, the INT pin transitions to a high state.
During operation, if one of the enabled supplies goes out of regulation, INT transitions to a low state, and the
corresponding bit in the PGOODZ register goes high. If the supply goes back to its regulation limits, INT
transitions back to a high state.
While INT is in an active low state, reading the PGOODZ register via the I2C bus forces INT into a high-Z state.
Since this pin requires an external pull-up resistor, the INT pin transitions to a logic high state even though the
supply in question is still out of regulation. The corresponding bit in the PGOODZ register still indicates that the
power rail is out of regulation.
Interrupts can be masked using the MASK register; default operation is not to mask any DCDC or LDO interrupts
since this provides the POWER_OK function. If none of the DCDC converters or LDos are enabled, /INT defaults
to a low state independently of the settings of the MASK register.
Copyright 2006–2010, Texas Instruments Incorporated
25
Product Folder Link(s) : TPS65023, TPS65023B
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相关代理商/技术参数 |
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| TPS65023RSBG4 | 制造商:Texas Instruments 功能描述: |
| TPS65023RSBR | 功能描述:电池管理 6Ch Pwr Mgmt IC 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 |
| TPS65023RSBRG4 | 功能描述:电池管理 6Ch Pwr Mgmt IC 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 |
| TPS65023RSBT | 功能描述:电池管理 6-Channel Power Management IC 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 |
| TPS65023RSBT | 制造商:Texas Instruments 功能描述:Power Management IC |
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