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| 型号： | TPS40060PWPG4 |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 稳压器 |
| 英文描述： | SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, PDSO16 |
| 封装： | GREEN, PLASTIC, HTSOOP-16 |
| 文件页数： | 11/33页 |
| 文件大小： | 750K |
| 代理商： | TPS40060PWPG4 |
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P
SR + PDC ) PRR ) PCOND
(W)
(37)
TPS40060/TPS40061 POWER DISSIPATION
P
D + Qg
V
DR
f
SW
(W)
(38)
P
T +
2
P
D
V
DR
) IQ
V
IN
(W)
(39)
P
T +
2
Qg
f
SW ) IQ
V
IN
(W)
(40)
f
SW +
T
J*TA
qJA VDD
* IQ
2
Qg
(Hz)
(41)
SLUS543E – DECEMBER 2002 – REVISED JUNE 2006
APPLICATION INFORMATION (continued)
The power dissipation in the TPS40060 and TPS40061 is largely dependent on the MOSFET driver currents and
the input voltage. The driver current is proportional to the total gate charge, Qg, of the external MOSFETs.
Driver power (neglecting external gate resistance, refer to [2] can be calculated from Equation 38.
And the total power dissipation in the device, assuming MOSFETs with similar gate charges for both the
high-side and synchronous rectifier is described in Equation 39.
or
where:
IQ is the quiescent operating current (neglecting drivers)
The maximum power capability of the device's PowerPad package is dependent on the layout as well as air
flow. The thermal impedance from junction to air, assuming 2 oz. copper trace and thermal pad with solder and
no air flow.
Θ
JA = 36.51°C/W
The maximum allowable package power dissipation is related to ambient temperature by Equation 36.
Substituting Equation 32 into Equation 40 and solving for fSW yields the maximum operating frequency for the
TPS40060 and TPS40061. The result is:
19
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相关代理商/技术参数 |
参数描述 |
|---|---|
| TPS40060PWPR | 功能描述:DC/DC 开关控制器 Wide Input Freq 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 |
| TPS40060PWPRG4 | 功能描述:DC/DC 开关控制器 Wide Input Freq 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 |
| TPS40061 | 制造商:TI 制造商全称:Texas Instruments 功能描述:WIDE-INPUT SYNCHRONOUS BUCK CONTROLLER |
| TPS40061PWP | 功能描述:DC/DC 开关控制器 Wide Input Sync Buck Cntrlr source/sink 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 |
| TPS40061PWP | 制造商:Texas Instruments 功能描述:IC 制造商:Texas Instruments 功能描述:IC, SYNC BUCK DC/DC CONTROLLER, 16-HTSSOP |
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