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參數(shù)資料
| 型號： | TC96C555MJA |
| 廠商： | TelCom Semiconductor, Inc. |
| 英文描述： | 3A OUTPUT PROGRAMMABLE POWER OSCILLATOR |
| 中文描述： | 3A輸出可編程功耗振蕩器 |
| 文件頁數(shù)： | 7/9頁 |
| 文件大小： | 106K |
| 代理商： | TC96C555MJA |
4-165
TELCOM SEMICONDUCTOR, INC.
7
6
5
4
3
1
2
8
TC96C555
3A OUTPUT PROGRAMMABLE
POWER OSCILLATOR
TYPICAL CHARACTERISTICS
(Cont.)
APPLICATIONS
The oscillator timing can easily be controlled by two
external resistors, R
CHG
and R
DIS
, and capacitor C. R
CHG
and R
DIS
set the two constant current sources for charging
and discharging C. The source current is always flowing
when in operation. When the capacitor has charged to a 2V
threshold, the current sink circuit is enabled to discharge the
R
ROUT vs. Temperature
Output HIGH
Temperature (°C)
VIN = 0V
10
–55 –35
5
25
45
65
85
105 125
–15
8
6
4
2
0
5V
10V
18V
R
ROUT vs. Temperature
Output LOW
Temperature (°C)
VIN = 3V
–55 –35
5
25
45
65
85
105 125
–15
0
5V
10V
18V
7
1
2
3
4
5
6
Figure 3. V
IN
and Output Waveform
4
VR1
3
2
VIN
VDD
VREF
1V
2V 3V
Q1
Q2
1
VR2
ISOURCE
4V
Q3
ISINK
7
6
OUTPUT
10μF
5
GND
VREF
8
RCHG
RDIS
1V
2V
C
Figure 2. Fixed Frequency Power Oscillator
4
3
6
7
OUTPUT
GND
2
1
C1 = 1800pF
5
VREF
INPUT
8
1
μ
F
WIMA
MKS-2
0.1
μ
F
CERAMIC
TEST CIRCUIT
VDD = 18V
TC96C555
+5V
INPUT
0V
18V
0V
OUTPUT
10%
tD1
tD2
90%
90%
10%
10%
90%
tR
100KHz Square Wave
tRISE = tFALL
≤
10nsec
tF
capacitor to the 1V threshold. When 1V is reached, the
current sink turns OFF to start another cycle.
Resistor R
CHG
is connected from V
REF
at Pin 3 to V
R1
Pin
4 to program the charging current. Current is set with resistor
R
DIS
connected from V
REF
Pin 3 to V
R2
Pin 1. Both currents
can range from 5
μ
A to 150
μ
A.
VIN
0V
2V
1V
OUTPUT
VDD
TCHG
Figure 1. Output Switching Time
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