參數(shù)資料
型號(hào)： TPS65820RSH
廠商： TEXAS INSTRUMENTS INC
元件分類： 電源管理
英文描述： 8-CHANNEL POWER SUPPLY SUPPORT CKT, PQCC56
封裝： 7 X 7 MM, PLASTIC, QFN-56
文件頁數(shù)： 59/98頁
文件大?。?/td> 2290K
代理商： TPS65820RSH
GATE
CONTROL
LOGIC
OSC
PGND1
VIN_SM1
3.3 H
m
OUT
(L1)
+
_
+
_
LSM1
OUTPUT
VOLTAGE
SETTING
PWMCONTROL SECTION
(SHOWNFORSM1,SAMETOPOLOGY FORSM2)
RAMP PEAK-TO-PEAKVOLTAGE
PROPORTIONAL TOVIN_SM1
ERROR AMP WITH “TYPE-3
LIKE” COMPENSATION
VO(SM1)
C21
10 F
m
C22
10 F
m
L1
SM1
Phase Control in PWM Mode
PFM Mode Operation
SLVS663B – MAY 2006 – REVISED APRIL 2008 .............................................................................................................................................................. www.ti.com
Figure 43. PWM Operation
The integrated power MOSFETs current is monitored at all times and the power MOSFET is turned off if its
internal short-circuit current limit is reached.
The SM1 and SM2 converters operate synchronized to each other when both are in PWM mode, with converter
SM1 as the master. I2C control register bits S1S2PHASE in register SM1_SET2 enables delaying the SM2 PWM
clock with respect to SM1 PWM clock, selecting a phase shift from 0 to 270 degrees. The out-of-phase operation
reduces the average current at the input node, enabling use of smaller input filter capacitors when both
converters are connected to the same input supply.
When using the I2C interface, the SM1 and SM2 converters can have the automatic power-saving PFM mode
enabled. When the PFM mode is set, the switching frequency is reduced and the internal bias currents are
decreased, optimizing the converter efficiency under light-load conditions.
In PFM mode, the output voltage is monitored by a voltage comparator, which regulates the output voltage to the
programmed value, VO(SM1). If the output voltage is below VO(SM1), the PFM control circuit turns on the power
stage, applying a burst of pulses to increase the output voltage. When the output voltage exceeds the target
regulation voltage, VO(SM1), the power stage is disabled, and the output voltage drops until it is below the
regulation voltage target, when the power stage is enabled again.
62
Copyright 2006–2008, Texas Instruments Incorporated
Product Folder Link(s): TPS65820
相關(guān)PDF資料
PDF描述
TRU050-GACHA-47M4570000 PHASE LOCKED LOOP, CDSO16
TRU050-GACNA-12M6240000 PHASE LOCKED LOOP, CDSO16
TRU050-GALNA-20M0000000 PHASE LOCKED LOOP, CDSO16
TRU050-GALNB-51M8400000 PHASE LOCKED LOOP, CDSO16
TRU050-GBCGB-19M4400000 PHASE LOCKED LOOP, CDSO16
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TPS65820RSHR 功能描述:電池管理 Int Sgl-Cell Lit-Ion Batt & Pwr Mgmt IC 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
TPS65820RSHRG4 功能描述:電池管理 Int Sgl-Cell Lit-Ion Batt & Pwr Mgmt IC 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
TPS65820RSHT 功能描述:電池管理 Int Sgl-Cell Lit-Ion Batt & Pwr Mgmt IC 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
TPS65820RSHTG4 功能描述:電池管理 Int Sgl-Cell Li-Ion Batt & Pwr Mgmt IC 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
TPS658310YFFR 功能描述:PMIC 解決方案 PMU w/Switching Chgr & Lighting Cntrl RoHS:否 制造商:Texas Instruments 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-24 封裝:Reel
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