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参数资料
| 型号： | ISL78010ANZ-T |
| 厂商： | Intersil |
| 文件页数： | 8/19页 |
| 文件大小： | 0K |
| 描述： | IC REG MULTI-OUTP 32-TQFP |
| 标准包装： | 2,000 |
| 应用： | LCD 显示器，车用 |
| 电流 - 电源： | 1.7mA |
| 电源电压： | 3 V ~ 5.5 V |
| 工作温度： | -40°C ~ 105°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 32-TQFP |
| 供应商设备封装： | 32-TQFP（5x5） |
| 包装： | 带卷 (TR) |
ISL78010
Applications Information
The ISL78010 provides a highly integrated multiple output
power solution for TFT-LCD automotive applications. The
system consists of one high efficiency boost converter and
three linear-regulator controllers (V ON , V OFF , and V LOGIC )
with multiple protection functions. A block diagram is shown
in Figure 20. Table 1 lists the recommended components.
The ISL78010 integrates an N-Channel MOSFET boost
converter to minimize external component count and cost.
The A VDD , V ON , V OFF , and V LOGIC output voltages are
independently set using external resistors. V ON , V OFF
voltages require external charge pumps which are post
Boost Converter
The main boost converter is a current mode PWM converter
at a fixed frequency of 1MHz, which enables the use of low
profile inductors and multi-layer ceramic capacitors. This
results in a compact, low cost power system for LCD panel
design.
The ISL78010 is designed for continuous current mode, but
it can also operate in discontinuous current mode at light
load. In continuous current mode, current flows continuously
in the inductor during the entire switching cycle in steady
state operation. The voltage conversion ratio in continuous
current mode is given by Equation 1:
A VDD 1
V IN
1 – D
regulated using the integrated LDO controllers.
TABLE 1. RECOMMENDED TYPICAL APPLICATION
DIAGRAM COMPONENTS
---------------- = -------------
(EQ. 1)
DESIGNATION
C 1 , C 2 , C 3
C 20 , C 31
D 1
D 11 , D 12 , D 21
L 1
Q 1
Q 2
DESCRIPTION
10μF, 16V X7R ceramic capacitor (1206)
TDK C3216X7RIC106M
4.7μF, 25V X5R ceramic capacitor (1206)
TDK C3216X5R1A475K
1A, 20V low leakage Schottky rectifier (CASE
457-04) ON SEMI MBRM120ET3
200mA, 30V Schottky barrier diode (SOT-23)
Fairchild BAT54S
6.8μH, 1.3A Inductor
TDK SLF6025T-6R8M1R3-PF
-2.4, -20V P-Channel 1.8V specified
PowerTrench MOSFET (SuperSOT-3)
Fairchild FDN304P
200mA, 40V NPN amplifier (SOT-23)
Fairchild MMBT3904
where D is the duty cycle of the switching MOSFET.
Figure 21 shows the block diagram of the boost regulator. It
uses a summing amplifier architecture consisting of GM
stages for voltage feedback, current feedback and slope
compensation. A comparator looks at the peak inductor
current cycle by cycle and terminates the PWM cycle if the
current limit is reached.
An external resistor divider is required to divide the output
voltage down to the nominal reference voltage. Current
drawn by the resistor network should be limited to maintain
the overall converter efficiency. The maximum value of the
resistor network is limited by the feedback input bias current
and the potential for noise being coupled into the feedback
pin. A resistor network in the order of 60k Ω is recommended.
The boost converter output voltage is determined by
Equation 2:
A VDD = --------------------- × V REF
Q 3
200mA, 40V PNP amplifier (SOT-23)
Fairchild MMBT3906
R 1 + R 2
R 1
(EQ. 2)
Q 4
-2A, -30V single P-Channel logic level
PowerTrench MOSFET (SuperSOT-3)
Fairchild FDN360P
The current through the MOSFET is limited to 2A peak. This
restricts the maximum output current based on Equation 3:
I OMAX = ? I LMT – -------- ? × ---------
V O
Q 5
1A, 30V PNP low saturation amplifier (SOT-23)
Fairchild FMMT549
? 2 ?
Δ I L V IN
(EQ. 3)
Where Δ I L is peak to peak inductor ripple current, and is set
by Equation 4:
Δ I L = --------- × -----
f S
8
V IN D
L
where f S is the switching frequency.
(EQ. 4)
FN6501.2
December 4, 2013
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ISL78010EVAL1Z | 功能描述:EVAL BOARD 1 FOR ISL78010 RoHS:是 类别:编程器，开发系统 >> 评估板 - DC/DC 与 AC/DC（离线）SMPS 系列:* 产品培训模块:Obsolescence Mitigation Program 标准包装:1 系列:True Shutdown™ 主要目的:DC/DC，步升 输出及类型:1，非隔离 功率 - 输出:- 输出电压:- 电流 - 输出:1A 输入电压:2.5 V ~ 5.5 V 稳压器拓扑结构:升压 频率 - 开关:3MHz 板类型:完全填充 已供物品:板 已用 IC / 零件:MAX8969 |
| ISL78020 | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:Automotive Grade TFT-LCD DC/DC with Integrated Amplifiers |
| ISL78020ANZ | 制造商:Intersil Corporation 功能描述:CONV DC-DC SGL-OUT STEP UP 32TQFP - Trays 制造商:Intersil 功能描述:AUTO GRD TFT-LCD DC- DC W/INTEGRTD AMP |
| ISL78020ANZ-T | 制造商:Intersil Corporation 功能描述:CONV DC-DC SGL-OUT STEP UP 32TQFP - Tape and Reel 制造商:Intersil 功能描述:AUTO GRD TFT-LCD DC- DC W/INTEGRTD AMP |
| ISL78022 | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:Automotive Grade TFT-LCD DC/DC with Integrated Amplifiers |
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