- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄382678 > TPS5102IDBR Analog IC PDF資料下載
參數(shù)資料
| 型號： | TPS5102IDBR |
| 英文描述： | Analog IC |
| 中文描述： | 模擬IC |
| 文件頁數(shù)： | 15/31頁 |
| 文件大小： | 1083K |
| 代理商： | TPS5102IDBR |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁當(dāng)前第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁
TPS5102
DUAL, HIGH-EFFICIENCY CONTROLLER FOR NOTEBOOK PC POWER
SLVS239 - SEPTEMBER 1999
15
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
output voltage setpoint calculation (continued)
If a higher precision resistor is used, the voltage setup can be more accurate.
In some applications, the output voltage is required to be lower than the reference voltage. With a few extra
components, the lower voltage can be easily achieved. The drawing below shows the method.
TPS5102
VCC
VO
R(top)
R(bottom)
Rz1
Zener
INV
Rz2
In the schematic, the Rz1, the Rz2, and the zener are the extra components. Rz1 is used to give the zener
enough current to build up the zener voltage. The zener voltage is added to INV through Rz2. Therefore, the
voltage on the INV is still equal to the IC internal voltage (1.185 V) even if the output voltage is regulated at a
lower setpoint. The equation for setting up the output voltage is shown below:
Rbtm
Vr
Rtop
)
Vo
–
Vr
(
)
Vr
Vz
(
2
Rz
+
–
=
When Rz2 is the adjusting resistor for low output voltage; Vz is the zener voltage; Vr is the internal reference
voltage; Rtop is the resistor of the voltage sensing network; Rbtm is the bottom resistor of the sensing
network;V
O
is the required output voltage setpoint.
Example: Assuming the required output voltage setpoint is V
O
= 0.8 V, V
Z
= 5 V; Rtop = 1 k
; Rbottom = 1 k
,
Then the Rz2 = 2.43 k
.
output inductor ripple current
The output inductor current ripple can affect not only the efficiency, but also the output voltage ripple. The
equation is exhibited below:
Iripple
Vin
Vout
Iout
Lout
(Rdson
R
L
)
D
Ts
Where Irippleis the peak-to-peak ripple current (A) through the inductor; Vinis the input voltage (V); Voutis the
output voltage (V); Ioutis the output current; Rdsonis the on-time resistance of MOSFET (
); Dis the duty cycle;
and Tsis the switching cycle (S). From the equation, it can be seen that the current ripple can be adjusted by
changing the output inductor value.
Example: Vin = 5 V; Vout = 1.8 V; Iout = 5 A; Rdson = 10 m
; RL = 5 m
; D = 0.36; Ts = 10
μ
S; Lout = 6
μ
H
Then, the ripple Iripple = 2 A.
Powered by ICminer.com Electronic-Library Service CopyRight 2003
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| TPS5102IDBT | Analog IC |
| TPS5103IDB | SMPS Controller |
| TPS5103IDBR | SMPS Controller |
| TPS5210DWR | Voltage-Mode SMPS Controller |
| TPS5210PWPR | Voltage-Mode SMPS Controller |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TPS5102IDBT | 功能描述:DC/DC 開關(guān)控制器 Dual Output Synch Buck Controller RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK |
| TPS5102IDBTG4 | 功能描述:DC/DC 開關(guān)控制器 Dual Output Synch Buck Cntrlr RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK |
| TPS5102IDBTR | 功能描述:DC/DC 開關(guān)控制器 Dual Output Synch Buck Cntrlr RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK |
| TPS5102IDBTRG4 | 功能描述:DC/DC 開關(guān)控制器 Dual Output Synch Buck Cntrlr RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK |
| TPS5103 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:MULTIPLE MODE SYNCHRONOUS DC/DC CONTROLLER |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。