参数资料
型号: L6728AHTR
厂商: STMICROELECTRONICS
元件分类: 稳压器
英文描述: SWITCHING CONTROLLER, PDSO10
封装: 3 X 3 MM, ROHS COMPLIANT, VFDFPN-10
文件页数: 21/33页
文件大小: 1033K
代理商: L6728AHTR
5 A demonstration board
L6728AH
28/33
Doc ID 15726 Rev 1
12.1
Demonstration board description
12.1.1
Power input (VIN)
This is the input voltage for the power conversion. The high-side drain is connected to this
input. This voltage can range from 1.5 V to 12 V bus.
If the voltage is between 5 V and 12 V it can supply also the device (through the Vcc pin)
and in this case the R16 (0
Ω) resistor must be present.
12.1.2
Output (VOUT)
Different output voltage rails have been tested. For each rail a few component need to be
changed: these components are used to program the desiderate output voltage. The OCP
limit is set to ~6 A but it can be changed by replacing the resistors R18.
Note:
All the previous resistors are SMD 0603 package, 1/16W, 1% tolerance.
12.1.3
Signal input (VCC)
Using the input voltage VIN to supply the controller no power is required at this input.
However the controller can be supplied separately from the power stage through the VCC
input (5-12 V) and, in this case, the R16 (0
Ω) resistor must be unsoldered.
12.1.4
Test points
Several test points are provided to have easy access at all important signal characterizing
the device:
COMP: The output of the error amplifier;
FB: The inverting input of the error amplifier;
PGOOD: Signaling the regular functioning (active high);
VGDHS: The bootstrap diode anode;
PHASE: Phase node;
LGATE: Low-Side gate pin of the device;
HGATE: High-Side gate pin of the device.
Table 9.
Rail dependent components
Ref.
8 V rail
5 V rail
3.3 V rail
2.5 V rail
1.25 V rail
0.8 V rail
R8, R13
240
Ω
430
Ω
680
Ω
1 k
Ω
3.9 k
Ω
Open
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L6728D 功能描述:电流型 PWM 控制器 SNGL PHASE PWM CONTROLLER RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14
L6728DTR 功能描述:电流型 PWM 控制器 Single-Phase PWM 5V to 12V Controller RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14
L6728H 功能描述:电压模式 PWM 控制器 Sgl Output 300 KHz DFN-10 RoHS:否 制造商:Texas Instruments 输出端数量:1 拓扑结构:Buck 输出电压:34 V 输出电流: 开关频率: 工作电源电压:4.5 V to 5.5 V 电源电流:600 uA 最大工作温度:+ 125 C 最小工作温度:- 40 C 封装 / 箱体:WSON-8 封装:Reel
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