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參數資料
| 型號： | TPS61002DGS |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | SINGLE-CELL BOOST CONVERTER WITH START-UP INTO FULL LOAD |
| 中文描述： | 單電池升壓轉換器，啟動成滿載 |
| 文件頁數： | 14/22頁 |
| 文件大小： | 389K |
| 代理商： | TPS61002DGS |
TPS61000, TPS61001, TPS61002, TPS61003, TPS61004, TPS61005, TPS61006
SINGLE-CELL BOOST CONVERTER WITH START-UP INTO FULL LOAD
SLVS279A – MARCH 2000 – REVISED MAY 2000
14
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
The TPS6100x boost converter family is intended for systems that are powered by a single-cell NiCd or NiMH
battery with a typical terminal voltage between 0.9 V to 1.6 V. It can also be used in systems that are powered
by two-cell NiCd or NiMH batteries with a typical stack voltage between 1.8 V and 3.2 V. Additionally, single-
or dual-cell, primary and secondary alkaline battery cells can be the power source in systems where the
TPS6100x is used.
programming the TPS61000 adjustable output voltage device
The output voltage of the TPS61000 can be adjusted with an external resistor divider. The typical value of the
voltage on the FB pin is 500 mV in fixed frequency operation and 485 mV in the power-save operation mode.
The maximum allowed value for the output voltage is 3.3 V. The current through the resistive divider should be
about 100 times greater than the current into the FB pin. The typical current into the FB pin is 0.01
μ
A, the voltage
across R4 is typically 500 mV. Based on those two values, the recommended value for R4 is in the range of
500 k
in order to set the divider current at 1
μ
A. From that, the value of resistor R3, depending on the needed
output voltage V
OUT
, can be calculated using the following equation:
R3
R4
VO
VFB
1
500 k
VO
500 mV
1
(1)
If, as an example, an output voltage of 2.5 V is needed, a 2 M
resistor should be chosen for R3.
VBAT
VOUT
LBO
5
10
3
R5
R3
R4
6
TPS61000
LBI
9
FB
COMP
2
CC1
100 pF
CC2
33 nF
RC
10 k
EN
NC
R2
R1
1
8
GND
SW
7
4
Ci
10
μ
F
10 V
Co
22
μ
F
10 V
Low Battery
Warning
L1
33
μ
H
D1
Figure 18. Typical Application Circuit for Adjustable Output Voltage Option
The output voltage of the adjustable output voltage version changes with the output current. Due to
device-internal ground shift, which is caused by the high switch current, the internal reference voltage and hence
the voltage on the FB pin increases with increasing output current. Since the output voltage follows the voltage
on the FB pin, the output voltage rises as well with a rate of 1 mV per 1 mA output current increase. Additionally,
when the converter goes into pulse-skip mode at output currents around 5 mA and lower, the output voltage
drops due to the hysteresis of the controller. This hysteresis is about 15 mV measured on the FB pin.
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相關代理商/技術參數 |
參數描述 |
|---|---|
| TPS61002DGSG4 | 功能描述:開關變換器、穩壓器與控制器 Lo-In Voltage Boost Converter RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關頻率:1 MHz 工作溫度范圍: 安裝風格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
| TPS61002DGSR | 功能描述:直流/直流開關調節器 Lo-In Voltage Boost Converter RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數量: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| TPS61002DGSRG4 | 功能描述:直流/直流開關調節器 Lo-In Voltage Boost Converter RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數量: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| TPS61002EVM-156 | 功能描述:電源管理IC開發工具 Low Input Vltg Boost Conv RoHS:否 制造商:Maxim Integrated 產品:Evaluation Kits 類型:Battery Management 工具用于評估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
| TPS61003 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:SINGLE-CELL BOOST CONVERTER WITH START-UP INTO FULL LOAD |
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