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參數(shù)資料
| 型號(hào)： | TPS65162RGZR |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 4.2 A SWITCHING REGULATOR, 900 kHz SWITCHING FREQ-MAX, PQCC48 |
| 封裝： | 7 X 7 MM, PLASTIC, VQFN-48 |
| 文件頁數(shù)： | 13/36頁 |
| 文件大小： | 1034K |
| 代理商： | TPS65162RGZR |
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A
6
.
3
V
I
)
D
1
(
I
out
in
SW
avg
=
×
-
=
(3)
F
SW
F
avg
D
V
)
D
1
(
I
V
I
P
×
-
×
=
×
=
(4)
Vout + 1.268 V
1 )
R1
R2
(5)
1
R
f
2
1
C
z
ff
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(6)
SLVS771B – MAY 2007 – REVISED JUNE 2008 ............................................................................................................................................................... www.ti.com
Rectifier Diode Selection
To achieve high efficiency, a Schottky diode should be used. The reverse voltage rating should be higher than
the maximum output voltage of the converter. The current rating for the Schottky diode is calculated as the off
time of the converter times the typical switch current of the TPS65162:
where ISW=typical switch current of the TPS65162 (3.6 A)
A Schottky diode with 2-A maximum average rectified forward current rating is sufficient for most applications.
The Schottky rectifier must have adequate power dissipation. The dissipated power is the average rectified
forward current times the diode forward voltage.
where ISW=typical switch current of the TPS65162 (3.6 A)
Table 4. Rectifier Diode Selection (Boost Converter)
Iavg
Vr
Vforward
RθJA
SIZE
COMPONENT SUPPLIER
3 A
20 V
0.36 at 3 A
46°C/W
SMC
MBRS320, International Rectifier
2 A
20 V
0.44 V at 2 A
75°C/W
SMB
SL22, Vishay Semiconductor
2 A
20 V
0.5 at 2 A
75°C/W
SMB
SS22, Fairchild Semiconductor
Setting the Output Voltage and Selecting the Feedforward Capacitor
The output voltage is set by the external resistor divider and is calculated as:
Across the upper resistor a bypass capacitor is required to speed up the circuit during load transients. The
capacitor is caluculated as:
Depending on the inductor value, the zero frequency needs to be set. fz is 19 kHz for a 10 H inductor, and 9
kHz for a 22
H inductor. A value coming closest to the calculated value should be used.
Compensation (VC)
The regulator loop can be compensated by adjusting the external components connected to the VC pin. The VC
pin is the output of the internal transconductance error amplifier. A single capacitor connected to this pin sets the
low frequency gain. A 22-nF capacitor is usually sufficient for most applications.
20
Copyright 2007–2008, Texas Instruments Incorporated
Product Folder Link(s): TPS65162
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| TPS65162RGZRG4 | 功能描述:LCD 驅(qū)動(dòng)器 12V/2.8A(I/O) 4-CH Multi-Converter RoHS:否 制造商:Maxim Integrated 數(shù)位數(shù)量:4.5 片段數(shù)量:30 最大時(shí)鐘頻率:19 KHz 工作電源電壓:3 V to 3.6 V 最大工作溫度:+ 85 C 最小工作溫度:- 20 C 封裝 / 箱體:PDIP-40 封裝:Tube |
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| TPS65163RGZT | 功能描述:其他電源管理 LCD Bias with Int 9Ch Level Shifter RoHS:否 制造商:Texas Instruments 輸出電壓范圍: 輸出電流:4 mA 輸入電壓范圍:3 V to 3.6 V 輸入電流: 功率耗散: 工作溫度范圍:- 40 C to + 110 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-48 封裝:Reel |
| TPS65165EVM-233 | 功能描述:電源管理IC開發(fā)工具 TPS65165 Evaluation Module RoHS:否 制造商:Maxim Integrated 產(chǎn)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 |
| TPS65165RSBR | 功能描述:LCD Gamma緩沖器 Compact LCD Bias IC RoHS:否 制造商:Maxim Integrated 輸入補(bǔ)償電壓: 轉(zhuǎn)換速度: 電源電壓-最大:20 V 電源電壓-最小:9 V 電源電流: 最大功率耗散: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFN-38 封裝:Tube |
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