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参数资料
| 型号： | TPS61200DRCRG4 |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 稳压器 |
| 英文描述： | 1.5 A BATTERY CHARGE CONTROLLER, 1650 kHz SWITCHING FREQ-MAX, PDSO10 |
| 封装： | 3 X 3 MM, GREEN, PLASTIC, SON-10 |
| 文件页数： | 7/28页 |
| 文件大小： | 1012K |
| 代理商： | TPS61200DRCRG4 |
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APPLICATION INFORMATION
DESIGN PROCEDURE
Programming the Output Voltage
OUT
FB
V
R1 = R2 x
- 1
V
÷
è
(1)
L
VIN
EN
UVLO
PS
GND
PGND
FB
VAUX
VOUT
TPS61200
VIN
VOUT
C1
C2
C3
L1
R1
R2
R3
R4
Programming the UVLO Threshold Voltage
SLVS577B – MARCH 2007 – REVISED FEBRUARY 2008
The TPS6120x DC/DC converters are intended for systems powered by a single up to triple cell Alkaline, NiCd,
NiMH battery with a typical terminal voltage between 0.7 V and 5.5 V. They can also be used in systems
powered by one-cell Li-Ion or Li-Polymer with a typical voltage between 2.5 V and 4.2 V. Additionally, any other
voltage source like solar cells or fuel cells with a typical output voltage between 0.3 V and 5.5 V can power
systems where the TPS6120x is used.
Within the TPS6120X family, there are fixed and adjustable output voltage versions available. To properly
configure the fixed output voltage devices, the FB pin is used to sense the output voltage. This means that it
must be connected directly to VOUT. At the adjustable output voltage versions, an external resistor divider is
used to adjust the output voltage. The resistor divider must be connected between VOUT, FB and GND. When
the output voltage is regulated properly, the typical value of the voltage at the FB pin is 500 mV. The maximum
recommended value for the output voltage is 5.5 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
A, and the voltage
across the resistor between FB and GND, R2, is typically 500 mV. Based on those two values, the recommended
value for R2 should be lower than 500 k, in order to set the divider current at 1 A or higher. It is recommended
to keep the value for this resistor in the range of 200 k
. The value of the resistor connected between VOUT and
If as an example, an output voltage of 3.3 V is needed, a 1-M
resistor should be chosen for R1 when for R2 a
180-k
has been selected.
Figure 24. Typical Application Circuit for Adjustable Output Voltage Option
The UVLO input can be used to shut down the main output if the supply voltage is getting too low. The internal
reference threshold is typically 250 mV. If the supply voltage should cause the shutdown when it is dropping
below 250 mV, it can be connected directly to the UVLO pin. If the shutdown has already happen at higher
voltages, a resistor divider can be used. R3 and R4 in Figure 24 show an example of how to monitor the input
voltage of the circuit. The current through the resistive divider should be about 100 times greater than the current
into the UVLO pin. The typical current into the UVLO pin is 0.01
A, and the voltage across R4 is equal to the
UVLO voltage threshold that is generated on-chip, which has a value of 250 mV. The recommended value for R4
is; therefore, in the range of 250 k
. From this, the value of resistor R3, depending on the desired shutdown
Copyright 2007–2008, Texas Instruments Incorporated
15
Product Folder Link(s): TPS61200 TPS61201 TPS61202
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| TPS61200DRCT | 功能描述:直流/直流开关调节器 0.3V In Vltg Boost RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
| TPS61200DRCT | 制造商:Texas Instruments 功能描述:DC/DC Charge Pump Converter (DC-DC) IC 制造商:Texas Instruments 功能描述:IC, SYNC BOOST CONVERTER, SON-10 |
| TPS61200DRCTG4 | 功能描述:直流/直流开关调节器 0.3V Input Vltg Boost Converter RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
| TPS61200EVM-179 | 功能描述:电源管理IC开发工具 TPS61200EVM-179 Evaluation Module RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
| TPS61201 | 制造商:TI 制造商全称:Texas Instruments 功能描述:LOW INPUT VOLTAGE SYNCHRONOUS BOOST CONVERTER WITH 1.3-A SWITCHES |
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