参数资料
| 型号： | EL7585AILZ-T7 |
| 厂商： | Intersil |
| 文件页数： | 12/19页 |
| 文件大小： | 0K |
| 描述： | IC POWER SUPPLY TFT-LCD 20-QFN |
| 标准包装： | 1,000 |
| 应用： | 转换器，TFT，LCD |
| 输入电压： | 3 V ~ 5 V |
| 输出数： | 4 |
| 输出电压： | 5.5 V ~ 20 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-VFQFN 裸露焊盘 |
| 供应商设备封装： | 20-QFN 裸露焊盘（4x4） |
| 包装： | 带卷 (TR) |
EL7585A
For the EL7585A, the minimum drive current is:
I_DRVL_min = 8mA
V IN OR V PROT
(3V TO 6V)
V LOGIC
The minimum base-emitter resistor, R BL , can now be
calculated as:
R BL _min = V BE _max/(I_DRVL_min - Ic/Hfe_min) =
1.25V/(8mA - 500mA/100) = 417 ?
This is the minimum value that can be used - so, we now
choose a convenient value greater than this minimum value;
say 500 ? . Larger values may be used to reduce quiescent
0.9V
PG_LDOL
+
-
LDO_LOG
R BL
500 ?
DRVL
FBL
R L1
Q5
(1.3V TO 3.6V)
C LOG
10μF
current, however, regulation may be adversely affected, by
supply noise if R BL is made too high in value.
-
+
GML
R L2
20k ?
V BOOST
0.1μF
LX
1: N1
0.9V
LDO_ON
FIGURE 23. V LOGIC FUNCTIONAL BLOCK DIAGRAM
PG_LDOP
+
-
+
-
GMP
36V
ESD
CLAMP
R BP
7k ?
DRVP
FBP
R P1
R P2
20k ?
Q3
CP (TO 36V)
0.1μF
V ON (TO 35V)
C ON
The V ON power supply is used to power the positive supply
of the row driver in the LCD panel. The DC-DC consists of an
external diode-capacitor charge pump powered from the
inductor (LX) of the boost converter, followed by a low
dropout linear regulator (LDO_ON). The LDO_ON regulator
uses an external PNP transistor as the pass element. The
onboard LDO controller is a wide band (>10MHz)
transconductance amplifier capable of 4mA drive current,
which is sufficient for up to 40mA or more output current
1: Np
FIGURE 21. V ON FUNCTIONAL BLOCK DIAGRAM
LX
0.1μF
under the low dropout condition (forced beta of 10). Typical
V ON voltage supported by EL7585A ranges from +15V to
+36V. A fault comparator is also included for monitoring the
output voltage. The under-voltage threshold is set at 25%
below the 1.2V reference.
The V OFF power supply is used to power the negative
supply of the row driver in the LCD panel. The DC-DC
consists of an external diode-capacitor charge pump
powered from the inductor (LX) of the boost converter,
followed by a low dropout linear regulator (LDO_OFF). The
PG_LDON
0.4V
-
+
LDO_OFF
FBN
V REF
R N2
20k ?
CP (TO -26V)
0.1μF
LDO_OFF regulator uses an external NPN transistor as the
pass element. The onboard LDO controller is a wide band
(>10MHz) transconductance amplifier capable of 4mA drive
current, which is sufficient for up to 40mA or more output
current under the low dropout condition (forced beta of 10).
Typical V OFF voltage supported by EL7585A ranges from
-5V to -20V. A fault comparator is also included for
1: Nn
R N1
V OFF (TO -20V)
monitoring the output voltage. The undervoltage threshold is
set at 200mV above the 0.2V reference level.
-
+
GMN
36V
ESD
CLAMP
DRVN
R BN
3k ?
Q2
C OFF
The V LOGIC power supply is used to power the logic circuitry
within the LCD panel. The DC-DC may be powered directly
from the low voltage input, 3.3V or 5.0V, or it may be
powered through the fault protection switch. The
LDO_LOGIC regulator uses an external PNP transistor as
FIGURE 22. V OFF FUNCTIONAL BLOCK DIAGRAM
12
the pass element. The onboard LDO controller is a wide
band (>10MHz) transconductance amplifier capable of
16mA drive current, which is sufficient for up to 160mA or
FN7523.3
March 9, 2006
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| EL7585ILZ-T7 | IC POWER SUPPLY TFT-LCD 20-QFN |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| EL7585AP_06 | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:TFT-LCD Power Supply |
| EL7585IL | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:TFT-LCD Power Supply |
| EL7585IL-T13 | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:TFT-LCD Power Supply |
| EL7585IL-T7 | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:TFT-LCD Power Supply |
| EL7585ILZ | 功能描述:IC POWER SUPPLY TFT-LCD 20-QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 专用型 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,000 系列:- 应用:电源，ICERA E400，E450 输入电压:4.1 V ~ 5.5 V 输出数:10 输出电压:可编程 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:42-WFBGA，WLCSP 供应商设备封装:42-WLP 包装:带卷 (TR) |
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