參數(shù)資料
型號(hào): TPS6734IDG4
廠商: TEXAS INSTRUMENTS INC
元件分類(lèi): 穩(wěn)壓器
英文描述: 1.5 A SWITCHING REGULATOR, 170 kHz SWITCHING FREQ-MAX, PDSO8
封裝: GREEN, PLASTIC, SOIC-8
文件頁(yè)數(shù): 2/22頁(yè)
文件大小: 479K
代理商: TPS6734IDG4
TPS6734I
FIXED 12-V 120-mA BOOST-CONVERTER SUPPLY
SLVS127A – AUGUST 1995 – REVISED JANUARY 1999
10
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
continuous mode
When the converter is delivering heavy loads from low voltage sources, it operates in continuous mode. As
shown in Figure 9, the inductor current does not drop to zero and the ringing is gone from the OUT voltage
waveform.
0
02
4
6
8
10
V
oltage
at
Out
V
5
15
CONTINUOUS MODE
20
12
14
16
18
10
1
0.5
0
I–
Inductor
Current
A
t – Time –
s
VI = 5 V
VO = 12 V
IL = 150 mA
Figure 9
pulse-skipping mode
At very light load currents, the TPS6734 cannot generate drive pulses sufficiently narrow to maintain regulation
and operate at 170 kHz. Under these circumstances, the converter operates in a pulse-skipping mode, in which
cycles are skipped. In pulse-skipping mode, the waveforms are irregular and the output ripple contains a
low-frequency component that may exceed 50 mV peak-to-peak.
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