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参数资料
| 型号： | PT6702N |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 稳压器 |
| 英文描述： | 13 A SWITCHING REGULATOR, 400 kHz SWITCHING FREQ-MAX, SMA23 |
| 封装： | VERTICAL MOUNT PACKAGE-23 |
| 文件页数： | 4/7页 |
| 文件大小： | 173K |
| 代理商： | PT6702N |
For technical support and more information, see inside back cover or visit www.ti.com/powertrends
Application Notes continued
Pin-Coded Output Voltage Adjustment on
Non-Isolated “Excalibur” Series ISRs
The PT6701/6702/6721 Excalibur ISRs incorporate
a pin-coded voltage control to adjust the ouput voltage.
The control pins are identified VID0 - VID4 (pins 3–7)
respectively. When these control pins are left open-circuit
the ISR output will regulate at its factory trimmed output
voltage. Each pin is internally connected to a precision
resistor, which when grounded changes the output voltage
by a set amount. By selectively grounding VID0-VID4, the
output voltage these ISRs can be programmed in incre-
mental steps over the specified output voltage range.
The program code and output voltage range of these
ISRs is compatible with the voltage ID specification
defined by Intel Corporation. The code is used in conjuction
with voltage regulator modules (VRMs) that are used to
power Intel’s Pentium microprocessors. Refer to Figure 1
below for the connection schematic, and the respective
device Data Sheet for the appropriate programming code
information.
Notes:
1. The programming convention is as follows:-
Logic 0:
Connect to pin13 (Remote Sense Ground).
Logic 1:
Open circuit/open drain (See notes 2, & 4)
2. Do not connect pull-up resistors to the voltage
programming pins.
3. To minimize output voltage error, always use pin 13
(Remote Sense Ground) as the logic “0” reference. While
the regular ground (pins 14-18) can also be used for
programming, doing so will degrade the load regulation of
the product.
Figure 1
4. If active devices are used to ground the voltage control
pins, low-level open drain MOSFET devices should be
used over bipolar transistors. The inherent Vce(sat) in
bipolar devices introduces errors in the device’s internal
voltage control circuit. Discrete transistors such as the
BSS138, 2N7002, IRLML2402, or the 74C906 hex open-drain
buffer are examples of appropriate devices.
Active Voltage Programming:
Special precautions should be taken when making changes
to the voltage control progam code while the unit is pow-
ered. It is highly recommended that the ISR be either
powered down or held in standby. Changes made to
the program code while Vout is enabled induces high
current transients through the device. This is the result
of the electrolytic output capacitors being either charged
or discharged to the new output voltage set-point. The
transient current can be minimized by making only incre-
mental changes to the binary code, i.e. one LSB at a time.
A minimum of 100s settling time between each program state
is also recommended. Making non-incremental changes to
VID3 and VID4 with the output enabled is discouraged. If
they are changed, the transients induced can overstress the
device resulting in a permanent drop in efficiency. If the
use of active devices prevents the program code being
asserted prior to power-up, pull pin 8 (STBY) to the device
GND during the period that the input voltage is applied to
Vin. Releasing pin 8 will then allow the device output to
initiate a soft-start power-up to the programmed voltage.
C
out
+
C
in
+
1
H
(Optional)
V
in
COM
STBY
L
O
A
D
Q1
COM
V
out
PT6700
7
654
3
2 3
19-22
13
8
14-18
2
10-12
Vo
Vin
GND
SNS(+)
SNS(-)
Pwr
Good
STBY
VID4 - VID0
1
OVP
PT6701/PT6702/PT6721 Series
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相关代理商/技术参数 |
参数描述 |
|---|---|
| PT6703 | 制造商:TI 制造商全称:Texas Instruments 功能描述:13-A Low-Voltage Programmable Integrated Switching Regulator |
| PT6703A | 功能描述:开关变换器、稳压器与控制器 1.1 to 1.85V 5/3.3V Input 13A Prog ISR RoHS:否 制造商:Texas Instruments 输出电压:1.2 V to 10 V 输出电流:300 mA 输出功率: 输入电压:3 V to 17 V 开关频率:1 MHz 工作温度范围: 安装风格:SMD/SMT 封装 / 箱体:WSON-8 封装:Reel |
| PT6703C | 功能描述:DC/DC转换器 1.1 to 1.85V 5/3.3V Input 13A Prog ISR RoHS:否 制造商:Murata 产品: 输出功率: 输入电压范围:3.6 V to 5.5 V 输入电压（标称）: 输出端数量:1 输出电压（通道 1）:3.3 V 输出电流（通道 1）:600 mA 输出电压（通道 2）: 输出电流（通道 2）: 安装风格:SMD/SMT 封装 / 箱体尺寸: |
| PT6703N | 功能描述:开关变换器、稳压器与控制器 1.1 to 1.85V 5/3.3V Input 13A Prog ISR RoHS:否 制造商:Texas Instruments 输出电压:1.2 V to 10 V 输出电流:300 mA 输出功率: 输入电压:3 V to 17 V 开关频率:1 MHz 工作温度范围: 安装风格:SMD/SMT 封装 / 箱体:WSON-8 封装:Reel |
| PT6705 | 制造商:TI 制造商全称:Texas Instruments 功能描述:13 Amp 5V/3.3V Input Adjustable Integrated Switching Regulator |
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