參數(shù)資料
型號(hào)： TPS40140RHHTG4
廠商： TEXAS INSTRUMENTS INC
元件分類： 穩(wěn)壓器
英文描述： 0.1 A DUAL SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, PQCC36
封裝： GREEN, PLASTIC, VQFN-36
文件頁(yè)數(shù)： 9/67頁(yè)
文件大?。?/td> 1418K
代理商： TPS40140RHHTG4
0.7
FBx
0
t0
t1
2.4
1.4
TRKx
FBx
t2
t3
VOUT
VREG
VPREBIAS
12
A
6
A
VOUT
CEXT
R1
+
0.7 V
+
U3
+
From CSx
Amplifier
+
Ramp1
U7 Comparator
PWM
Logic
FBx
TRKx
Error Amplifier
COMPx
RBIAS
12
A
6
A
VREF
UDG06031
5.6 TRACK FUNCTION IN CONFIGURING A SLAVE CHANNEL
TPS40140
DUAL OR 2-PHASE, STACKABLE CONTROLLER
www.ti.com
SLUS660F – SEPTEMBER 2005 – REVISED SEPTEMBER 2009
Figure 5-2. Soft-Start with Pre-Biased Output Waveforms
Figure 5-3. Implementation of Pre-Biased Output
DESIGN HINT
If the pre-biased is greater than the regulation voltage, the controller does not start. This
is a condition of an overvoltage being applied before the controller starts PWM switching.
The TRKx pin is internally clamped to 2.4 V. To configure a channel as a slave, the TRKx pin is pulled up
externally to 5 V. This configures the output of the error amplifier, COMPx, for that channel to be a high
impedance, allowing the master COMP signal to control the slave channel.
APPLICATION INFORMATION
17
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