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| 型号： | TPS40197RGYR |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 稳压器 |
| 英文描述： | SWITCHING CONTROLLER, 520 kHz SWITCHING FREQ-MAX, PQCC16 |
| 封装： | PLASTIC, MO-241BB, VQFN-16 |
| 文件页数： | 8/30页 |
| 文件大小： | 931K |
| 代理商： | TPS40197RGYR |
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TI Information — Selective Disclosure
SLUS886 – NOVEMBER 2008
www.ti.com
Table 2. Voltage Identification Codes
VID TERMINALS (0 = LOW, 1 = HIGH)
VREF
VID3
VID2
VID1
VID0
(Vdc)
0
0.90
0
1
0.92
0
1
0
0.94
0
1
0.96
0
1
0
0.98
0
1
0
1
1.00
0
1
0
1.02
0
1
1.04
1
0
1.06
1
0
1
1.08
1
0
1
0
1.10
1
0
1
1.12
1
0
1.14
1
0
1
1.16
1
0
1.18
1
1.20
Minimum On-Time Consideration
The TPS40197 has a minimum on-time of 110 ns (maximum). With the restriction of this minimum on-time, the
device may begin to skip pulses to effectively lower the overall on-time to keep the output in regulation when
operating at high input-to-output conversion ratio. If pulse skipping is undesirable for some reason, it is
recommended that the maximum input voltage be limited to 13.5 V.
BP Regulator
The TPS40197 has an on board 5-V BP regulator that allows the parts to operate from a single voltage feed. No
separate 5-V feed to the part is required. This regulator needs to have a minimum of 1-mF of capacitance on the
BP pin to guarantee stability. A ceramic capacitor is suggested for this purpose.
This regulator can also be used to supply power to nearby circuitry, eliminating the need for a separate LDO in
some cases. If this pin is used for external loads, be aware that this is the power supply for the internals of the
TPS40197. While efforts have been made to reduce sensitivity, any noise induced on this line has an adverse
effect on the overall performance of the internal circuitry and shows up as increased pulse jitter, or skewed
reference voltage. Also, when the device is disabled by pulling the EN pin low, this regulator is turned off and will
not be available to supply power.
The amount of power available from this pin varies with the size of the power MOSFETs that the drivers must
operate. Larger MOSFETs require more gate drive current and reduce the amount of power available on this pin
for other tasks. The total current that can be drawn from this pin by both the gate drive and external loads cannot
exceed 50 mA. The device itself consumes up to 4 mA from the regulator and the total gate drive current can be
found from Equation 6.
16
Copyright 2008, Texas Instruments Incorporated
Product Folder Link(s): TPS40197
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相关代理商/技术参数 |
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| TPS40197RGYT | 功能描述:DC/DC 开关控制器 4.5-14V Inp Synch Buck Cntrlr RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| TPS40-20 | 制造商:TOTAL-POWER 制造商全称:TOTAL-POWER 功能描述:40 WATT OPEN - FRAME SWITCHING POWER SUPPLY |
| TPS40200 | 制造商:TI 制造商全称:Texas Instruments 功能描述:WIDE INPUT RANGE NON-SYNCHRONOUS VOLTAGE MODE CONTROLLER |
| TPS40200_08 | 制造商:TI 制造商全称:Texas Instruments 功能描述:WIDE INPUT RANGE NON-SYNCHRONOUS VOLTAGE MODE CONTROLLER |
| TPS40200_081 | 制造商:TI 制造商全称:Texas Instruments 功能描述:WIDE INPUT RANGE NON-SYNCHRONOUS VOLTAGE MODE CONTROLLER |
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