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参数资料
| 型号： | V62/07616-03XE |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 稳压器 |
| 英文描述： | 6.5 A SWITCHING REGULATOR, 700 kHz SWITCHING FREQ-MAX, PDSO16 |
| 封装： | GREEN, PLASTIC, HTSSOP-16 |
| 文件页数： | 10/35页 |
| 文件大小： | 1132K |
| 代理商： | V62/07616-03XE |
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APPLICATION INFORMATION
+
Design Procedure
Switching Frequency
RT (kW) +
46000
s (kHz) * 35.9
(9)
SLVS684A – JANUARY 2007 – REVISED JULY 2009 ....................................................................................................................................................... www.ti.com
Figure 25 shows the schematic for a typical TPS54356 application. The TPS54356 can provide up to 3-A output
current at a nominal output voltage of 3.3 V. For proper thermal performance, the exposed PowerPAD package
underneath the device must be soldered down to the printed circuit board.
Figure 25. Application Circuit, 12 V to 3.3 V
The following design procedure can be used to select component values for the TPS54356. Alternately, the
SWIFT Designer Software may be used to generate a complete design. The SWIFT Designer Software uses an
iterative design procedure and accesses a comprehensive database of components when generating a design.
This section presents a simplified discussion of the design process.
To begin the design process, a few parameters must be decided upon. The designer needs to know the
following:
Input voltage range
Output voltage
Input ripple voltage
Output ripple voltage
Output current rating
Operating frequency
For this design example, use the following as the input parameters:
DESIGN PARAMETER
EXAMPLE VALUE
Input voltage range
6 V to 18 V
Output voltage
3.3 V
Input ripple voltage
300 mV
Output ripple voltage
10 mV
Output current rating
3 A
Operating frequency
500 kHz
The switching frequency is set using the RT pin. Grounding RT sets the PWM switching frequency to a default
frequency of 250 kHz. Floating RT sets the PWM switching frequency to 500 kHz. By connecting a resistor from
RT to AGND, any frequency in the range of 250 kHz to 700 kHz can be set. Use equation 9 to determine the
proper value of RT.
In this example circuit, RT is not connected and the switching frequency is set at 500 kHz.
18
Copyright 2007–2009, Texas Instruments Incorporated
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