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參數(shù)資料
| 型號： | TPS65023QRHARQ1 |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 電源管理 |
| 英文描述： | POWER SUPPLY SUPPORT CKT, PQCC40 |
| 封裝： | 6 X 6 MM, GREEN, PLASTIC, MO-220VJJD-2, VQFN-40 |
| 文件頁數(shù)： | 33/54頁 |
| 文件大?。?/td> | 1546K |
| 代理商： | TPS65023QRHARQ1 |
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I
RMSCout
=V
out
x
1-
V
out
V
in
L x
x
1
2x
3
DVout =Vout x
1-
Vout
Vin
L x
x
+ESR
(
)
1
8xC
x
out
www.ti.com
SLVS927C – MARCH 2009 – REVISED MAY 2010
A more conservative approach is to select the inductor current rating just for the maximum switch current of the
TPS65023 (2 A for the VDCDC1 and VDCDC2 converters, and 1.5 A for the VDCDC3 converter). The core
material from inductor to inductor differs and has an impact on the efficiency especially at high switching
frequencies.
See Table 5 and the typical applications for possible inductors.
Table 5. Tested Inductors
DEVICE
INDUCTOR VALUE
TYPE
COMPONENT SUPPLIER
2.2 mH
LPS4012-222LMB
Coilcraft
All converters
2.2 mH
VLCF4020T-2R2N1R7
TDK
Output Capacitor Selection
The advanced Fast Response voltage mode control scheme of the inductive converters implemented in the
TPS65023 allow the use of small ceramic capacitors with a typical value of 10 mF for each converter without
having large output voltage under and overshoots during heavy load transients. Ceramic capacitors having low
ESR values have the lowest output voltage ripple and are recommended. See Table 6 for recommended
components.
If ceramic output capacitors are used, the capacitor RMS ripple current rating always meets the application
requirements. Just for completeness, the RMS ripple current is calculated as:
(6)
At nominal load current, the inductive converters operate in PWM mode. The overall output voltage ripple is the
sum of the voltage spike caused by the output capacitor ESR plus the voltage ripple caused by charging and
discharging the output capacitor:
(7)
Where the highest output voltage ripple occurs at the highest input voltage Vin.
At light load currents, the converters operate in PSM and the output voltage ripple is dependent on the output
capacitor value. The output voltage ripple is set by the internal comparator delay and the external capacitor. The
typical output voltage ripple is less than 1% of the nominal output voltage.
Input Capacitor Selection
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-mF 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-mF 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 6. Possible Capacitors
CAPACITOR VALUE
CASE SIZE
COMPONENT SUPPLIER
COMMENTS
22 mF
1206
TDK C3216X5R0J226M
Ceramic
22 mF
1206
Taiyo Yuden JMK316BJ226ML
Ceramic
22 mF
0805
TDK C2012X5R0J226MT
Ceramic
22mF
0805
Taiyo Yuden JMK212BJ226MG
Ceramic
10 mF
0805
Taiyo Yuden JMK212BJ106M
Ceramic
10 mF
0805
TDK C2012X5R0J106M
Ceramic
Copyright 2009–2010, Texas Instruments Incorporated
39
Product Folder Link(s): TPS65023-Q1
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| TPS65023QRSBRQ1 | 功能描述:電池管理 Auto Cat 6Ch Pwr Mgmt IC 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 |
| TPS65023RSBG4 | 制造商:Texas Instruments 功能描述: |
| TPS65023RSBR | 功能描述:電池管理 6Ch Pwr Mgmt IC 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 |
| TPS65023RSBRG4 | 功能描述:電池管理 6Ch Pwr Mgmt IC 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 |
| TPS65023RSBT | 功能描述:電池管理 6-Channel Power Management IC 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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