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參數(shù)資料
| 型號： | MC34271 |
| 廠商： | ON SEMICONDUCTOR |
| 英文描述： | Liquid Crystal Display and Backlight Integrated Controller |
| 中文描述： | 液晶顯示器和背光集成控制器 |
| 文件頁數(shù)： | 4/12頁 |
| 文件大?。?/td> | 343K |
| 代理商： | MC34271 |
MC34271
http://onsemi.com
4
ELECTRICAL CHARACTERISTICS
(continued)
(VDD = 6.0 V, for typical values TA = Low to High [Note 1], for min/max values TA is
the operating ambient temperature range that applies, unless otherwise noted.)
Characteristic
Unit
Max
Typ
Min
Symbol
AUXILIARY VOLTAGE OUTPUTS
V1, V2, V3, V4 Outputs
1–V1/V0 Ratio
1–V2/V0 Ratio
V3/V0 Ratio
V4/V0 Ratio
Output Resistance (Isource = 4.0 mA)
Output Short Circuit Current
0.0500
0.1010
0.1010
0.0500
20
5.0
0.0520
0.1035
0.1035
0.0520
40
10
0.0535
0.1065
0.1065
0.0535
60
20
Ro
Iss
mA
LOGIC INPUTS (EN1, EN2, MODE)
Input Low State
VIL
VIH
Rin
0
–
0.8
V
Input High State
2.0
–
6.0
V
Input Impedance
25
50
100
k
SOFT START CONTROL (SS1,SS2)
Charge Current (Capacitor Voltage = 1.0 V to 4.0 V
)
Ichg
0.5
1.0
2.5
μ
A
Discharge Current (Capacitor Voltage = 1.0 V)
Idschg
250
650
–
A
TOTAL SUPPLY CURRENT
VDD Current
Standby Mode (EN1 = EN2 = 0)
VDD Current
Backlight “On” (EN1 = 1; EN2 = 0)
VDD Current
LCD “On” (No Inductor) (EN1 = 0; EN2 = 1)
VB Current (V0 = 35 V)
VDD = 6.0 V
VDD = 16 V
ICC
–
–
2.0
3.0
5.0
15
μ
A
ICC
–
0.7
3.0
mA
ICC
–
0.9
2.0
mA
IO
–
1.2
3.0
mA
NOTE:
1. Low duty pulse techniques are used during test to maintain junction temperature as close to ambient as possible.
10
100
1.5
1.0
AV
f, FREQUENCY (Hz)
D
Figure 1. Switch Output Duty Cycle versus
Compensation Voltage
VComp, COMPENSATION VOLTAGE (V)
Figure 2. Error Amp Open Loop Gain and
Phase versus Frequency
0.6
0.4
0.2
0
0.8
80
60
40
20
0
–20
2.0
2.5
3.0
3.5
4.0
4.5
100
1.0 k
10 k
100 k
1000 k
90
120
150
180
VDD = 6.0 V
TA = 25
°
C
VDD = 6.0 V
VComp = 2.5 V
RL = Open
TA = 25
°
C
0
30
60
Gain
Phase
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