参数资料
型号: MAX8795AGCJ+T
厂商: Maxim Integrated Products
文件页数: 11/31页
文件大小: 0K
描述: IC CONV DC-DC TFT-LCD 32LQFP
产品培训模块: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
标准包装: 2,000
应用: 转换器,TFT,LCD
输入电压: 2.5 V ~ 6 V
输出数: 8
输出电压: 2.5 V ~ 18 V
工作温度: -40°C ~ 105°C
安装类型: 表面贴装
封装/外壳: 32-LQFP
供应商设备封装: 32-LQFP(7x7)
包装: 带卷 (TR)
TFT-LCD DC-DC Converter with
Operational Amplifiers
Typical Operating Characteristics
(Circuit of Figure 1, V IN = 5V, V MAIN = 14V, V GON = 25V, V GOFF = -10V, T A = +25°C, unless otherwise noted.)
90
85
80
75
70
STEP-UP EFFICIENCY
vs. LOAD CURRENT
V IN = 5V
V MAIN = 13.9V
1.4
1.3
1.2
1.1
1.0
SWITCHING FREQUENCY
vs. INPUT VOLTAGE
18
15
12
9
6
3
0
STEP-UP SUPPLY CURRENT
vs. SUPPLY VOLTAGE
NO LOAD, SUP DISCONNECTED,
R1 = 221k ? , R2 = 21.5k ?
CURRENT INTO INDUCTOR
CURRENT INTO IN PIN
1
10
100
1000
2.5
3.0
3.5
4.0
4.5
5.0
5.5
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
LOAD CURRENT (mA)
STEP-UP REGULATOR SOFT-START
(HEAVY LOAD)
MAX8795A toc04
A
INPUT VOLTAGE (V)
STEP-UP REGULATOR PULSED
LOAD-TRANSIENT RESPONSE
MAX8795A toc05
A
SUPPLY VOLTAGE (V)
TIMER-DELAYED OVERLOAD PROTECTION
MAX8795A toc06
0V
B
50mA
A
13.9V
B
0V
C
B
1.2500
1.2495
1.2490
1.2485
2ms/div
A: V IN , 5V/div
B: V MAIN , 5V/div
C: INDUCTOR CURRENT, 1A/div
REF VOLTAGE LOAD REGULATION
0A
0
-0.2
-0.4
10 μ s/div
A: LOAD CURRENT, 1A/div
B: V MAIN , 200mV/div, AC-COUPLED
C: INDUCTOR CURRENT, 1A/div
GATE-ON REGULATOR LINE REGULATION
C
0A
-0.1
40ms/div
A: V MAIN , 2V/div
B: INDUCTOR CURRENT, 1A/div
GATE-ON REGULATOR LOAD REGULATION
0A
0U
-0.3
1.2480
-0.6
1.2475
1.2470
-0.8
I POS = 20mA
-0.5
I BOOST = 200mA
0
10
20
30
40
50
25
26
27
28
29
30
0
5
10
15
20
LOAD CURRENT ( μ A)
INPUT VOLTAGE (V)
LOAD CURRENT (mA)
______________________________________________________________________________________
11
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