參數(shù)資料
型號(hào)： TPS62050DGSG4
廠商： TEXAS INSTRUMENTS INC
元件分類： 穩(wěn)壓器
英文描述： 1.4 A SWITCHING REGULATOR, 1000 kHz SWITCHING FREQ-MAX, PDSO10
封裝： GREEN, PLASTIC, MSOP-10
文件頁(yè)數(shù)： 6/25頁(yè)
文件大?。?/td> 602K
代理商： TPS62050DGSG4
www.ti.com
LBI
ENABLE
LBO
VIN
Bandgap
LBI
Comparator
Enable to Internal Circuitry
FB
PG
VIN
8
LBO
GND
SYNC
EN
LBI
PGND
TPS62051
SW
1
6
7
3
2
9
5
4
10
R3
R4
R1
R2
R5
R6
R7
1 Cell Li-lon
Ci = 10 F
L1 = 10
H
VO = 2.5 V / 600 mA
Co = 22 F
C(ff) =
6.8 pF
TPS62050, TPS62051
TPS62052, TPS62054, TPS62056
SLVS432D – SEPTEMBER 2002 – REVISED OCTOBER 2003
APPLICATION INFORMATION (continued)
ENABLE/Low-Battery Detector (Enhanced Version) TPS62051 Only
The TPS62051 offers an enhanced LBI functionality to provide a precise, user programmable undervoltage
shutdown. No additional supply voltage supervisor (SVS) is needed to provide this function.
When the enable (EN) pin is pulled high, only the internal bandgap voltage reference is switched on to provide a
reference source for the LBI comparator. As long as the voltage at LBI is less than the LBI trip point, all other
internal circuits are shut down, reducing the supply current to 5 A. As soon as input voltage at LBI rises above
the LBI trip point of 1.21 V, the device is completely enabled and starts switching.
Figure 19. Block Diagram of ENABLE/LBI Functionality for TPS62051
The logic level of the LBO pin is not defined for the first 500 s after EN is pulled high.
When the enhanced LBI is used to supervise the battery voltage and shut down the TPS62051 at low input
voltages, the battery voltage rises again when the current drops to zero. The implemented hysteresis on the LBI
pin may not be sufficient for all types of batteries. Figure 20 shows how an additional external hysteresis can be
implemented.
Figure 20. Enhanced LBI With Increased Hysteresis
A MATHCAD file to calculate R7 can be downloaded from the product folder on the TI web.
14
相關(guān)PDF資料
PDF描述
TLVH431QDBZRG4 1-OUTPUT THREE TERM VOLTAGE REFERENCE, 1.24 V, PDSO3
TLVH431IBQDBZR 1-OUTPUT THREE TERM VOLTAGE REFERENCE, 1.24 V, PDSO3
TPS60120PWPG4 0.2 A SWITCHED CAPACITOR REGULATOR, 450 kHz SWITCHING FREQ-MAX, PDSO20
TPS60121PWPG4 0.2 A SWITCHED CAPACITOR REGULATOR, 450 kHz SWITCHING FREQ-MAX, PDSO20
TC151A3413EOA723 0.25 A SWITCHING REGULATOR, 50 kHz SWITCHING FREQ-MAX, PDSO8
相關(guān)代理商/技術(shù)參數(shù)
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TPS62050DGSR 制造商:Texas Instruments 功能描述:DC/DC Converter IC
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TPS62051DGS 功能描述:直流/直流開關(guān)調(diào)節(jié)器 Adj 800-mA 10V Vin Step-Down Converter RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5
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