參數(shù)資料
型號(hào): DRV8800PWPR
廠商: TEXAS INSTRUMENTS INC
元件分類: 運(yùn)動(dòng)控制電子
英文描述: BRUSH DC MOTOR CONTROLLER, 2.8 A, PDSO16
封裝: PLASTIC, HTSSOP-16
文件頁(yè)數(shù): 6/27頁(yè)
文件大?。?/td> 952K
代理商: DRV8800PWPR
P
D = I (R
2
DS(on)Source + RDS(onSink))
1
2
3
1
2
3
DriveCurrent
Slowdecaywithsynchronousrectification (brake)
Fastdecaywithsynchronousrectification (reverse)
VBB
SLVS855E – JULY 2008 – REVISED OCTOBER 2010
www.ti.com
APPLICATION INFORMATION
Power Dissipation
First-order approximation of power dissipation in the DRV8800/DRV8801 can be calculated by examining the
power dissipation in the full-bridge during each of the operation modes. DRV8800/DRV8801 utilize synchronous
rectification. During the decay cycle, the body diode is shorted by the low-Rds(ON) driver, which in turn reduces
power dissipation in the full-bridge. In order to prevent shoot through (high-side and low-side drivers on the same
side are ON at the same time), DRV8800/DRV8801 implement a 500-ns typical crossover delay time. During this
period, the body diode in the decay current path conducts the current until the DMOS driver turns on. High
current and high ambient temperature applications should take this into consideration. In addition, motor
parameters and switching losses can add power dissipation that could affect critical applications.
Drive Current
This current path is through the high-side sourcing DMOS driver, motor winding, and low-side sinking DMOS
driver. Power dissipation I2R loses in one source and one sink DMOS driver, as shown in Equation 1.
(1)
DRV8800
14
Copyright 2008–2010, Texas Instruments Incorporated
Product Folder Link(s): DRV8800 DRV8801
相關(guān)PDF資料
PDF描述
DRW16 ROTARY CODED SWITCH-16POSITIONS, HEXADECIMAL, LATCHED, THROUGH HOLE-STRAIGHT
5-1437584-7 ROTARY CODED SWITCH-16POSITIONS, HEXADECIMAL, LATCHED, THROUGH HOLE-STRAIGHT
DS-1177 Power Dividers Space Qualified
DS-1178 Power Dividers Space Qualified
DS-117 Three-Way Power Dividers 1300 MHz
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