參數(shù)資料
型號(hào): TPS40052PWPRG4
廠商: TEXAS INSTRUMENTS INC
元件分類: 穩(wěn)壓器
英文描述: SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, PDSO16
封裝: GREEN, PLASTIC, HTSSOP-16
文件頁(yè)數(shù): 4/33頁(yè)
文件大?。?/td> 753K
代理商: TPS40052PWPRG4
TPS40052
SLUS563C AUGUST 2003 REVISED FEBRUARY 2005
12
www.ti.com
APPLICATION INFORMATION
The current limit programming resistor (RILIM) is calculated using equation (12). Care must be taken in choosing
the values used for VOS and ISINK in the equation. In order to ensure the output current at the overcurrent level,
the minimum value of ISINK and the maximum value of VOS must be used.
R
ILIM +
I
OC
R
DS(on)[max]
I
SINK
)
V
OS
I
SINK
(
W)
where:
D ISINK is the current into the ILIM pin and is 8.6 A, minimum
D IOC is the overcurrent setpoint which is the DC output current plus one-half of the peak inductor current
D VOS is the overcurrent comparator offset and is 30 mV, maximum
UDG02136
HDRV
CLOCK
VVINVSW
SS
7 CURRENT LIMIT TRIPS
(HDRV CYCLE TERMINATED BY CURRENT LIMIT
TRIP)
7 SOFT-START CYCLES
VILIM
tBLANKING
Figure 3. Typical Current Limit Protection Waveforms
(12)
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