參數(shù)資料
型號(hào)： TPS65021RHARG4
廠商： TEXAS INSTRUMENTS INC
元件分類： 電源管理
英文描述： 3-CHANNEL POWER SUPPLY SUPPORT CKT, PQCC40
封裝： 6 X 6 MM, GREEN, PLASTIC, MO-220/VJJD-2, QFN-40
文件頁(yè)數(shù)： 32/47頁(yè)
文件大?。?/td> 1180K
代理商： TPS65021RHARG4
www.ti.com
Input Capacitor Selection
Output Voltage Selection
VDCDC3
DCDC3_EN
DEFDCDC3
AGND
PGND
L3
R1
R2
VO
L
CO
VCC
VINDCDC3
CI
1 F
m
10R
V(bat)
SLVS613B – OCTOBER 2005 – REVISED JULY 2007
Because of the nature of the buck converter having a pulsating input current, a low ESR input capacitor is
required for best input voltage filtering and minimizing the interference with other circuits caused by high input
voltage spikes. Each dc-dc converter requires a 10-
μF ceramic input capacitor on its input pin VINDCDCx. The
input capacitor is increased without any limit for better input voltage filtering. The VCC pin is separated from the
input for the dc-dc converters. A filter resistor of up to 10R and a 1-
μF capacitor is used for decoupling the VCC
pin from switching noise. Note that the filter resistor may affect the UVLO threshold since up to 3 mA can flow
via this resistor into the VCC pin when all converters are running in PWM mode.
Table 5. Possible Capacitors
CAPACITOR VALUE
CASE SIZE
COMPONENT SUPPLIER
COMMENTS
22
μF
1206
TDK C3216X5R0J226M
Ceramic
22
μF
1206
Taiyo Yuden JMK316BJ226ML
Ceramic
22
μF
0805
TDK C2012X5R0J226MT
Ceramic
22
μF
0805
Taiyo Yuden JMK212BJ226MG
Ceramic
10
μF
0805
Taiyo Yuden JMK212BJ106M
Ceramic
10
μF
0805
TDK C2012X5R0J106M
Ceramic
The DEFDCDC1, DEFDCDC2, and DEFDCDC3 pins are used to set the output voltage for each step-down
converter. See Table 6 for the default voltages if the pins are pulled to GND or to VCC. If a different voltage is
needed, an external resistor divider can be added to the DEFDCDCx pin as shown in Figure 35.
The output voltage of VDCDC3 is set with the I2C interface. If the voltage is changed from the default, using the
DEFCORE register, the output voltage only depends on the register value. Any resistor divider at DEFDCDC3
does not change the voltage set with the register.
Table 6.
PIN
LEVEL
DEFAULT OUTPUT VOLTAGE
VCC
3.3 V
DEFDCDC1
GND
3 V
VCC
2.5 V
DEFDCDC2
GND
1.8 V
VCC
1.55 V
DEFDCDC3
GND
1.3 V
Using an external resistor divider at DEFDCDCx:
Figure 35. External Resistor Divider
38
相關(guān)PDF資料
PDF描述
TS3809CXERF 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO3
TC151A6023EOA713 0.25 A SWITCHING REGULATOR, 50 kHz SWITCHING FREQ-MAX, PDSO8
TC151B4332EOA713 0.25 A SWITCHING REGULATOR, 50 kHz SWITCHING FREQ-MAX, PDSO8
TC151B5933EOA723 0.25 A SWITCHING REGULATOR, 50 kHz SWITCHING FREQ-MAX, PDSO8
TC151B5735EOA723 0.25 A SWITCHING REGULATOR, 50 kHz SWITCHING FREQ-MAX, PDSO8
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TPS65021RHAT 功能描述:電池管理 6-Ch Pwr Mgmt IC for Li-Ion Systems 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
TPS65021RHATG4 功能描述:電池管理 6-Ch Pwr Mgmt IC for Li-Ion Systems 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
TPS65022RHAR 功能描述:電池管理 Pwr Mgmt IC for Li-Ion Pwred Sys 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
TPS65022RHARG4 功能描述:電池管理 Pwr Mgmt IC for Li-Ion Pwred Sys 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
TPS65022RHAT 功能描述:電池管理 Pwr Mgmt IC for Li-Ion Pwred Sys 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
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