参数资料
型号: MAX1554ETA+T
厂商: Maxim Integrated
文件页数: 7/11页
文件大小: 0K
描述: IC LED DVR WHITE BCKLGT 8TDFN
产品培训模块: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
标准包装: 1
恒定电流:
拓扑: PWM,升压(升压)
输出数: 1
内部驱动器:
类型 - 主要: 背光
类型 - 次要: 白色 LED
电源电压: 3.15 V ~ 5.5 V
输出电压: 40V
安装类型: 表面贴装
封装/外壳: 8-WDFN 裸露焊盘
供应商设备封装: 8-TDFN-EP(3x3)
包装: 标准包装
工作温度: -40°C ~ 85°C
其它名称: MAX1554ETA+TDKR
High-Efficiency, 40V Step-Up
Converters for 2 to 10 White LEDs
Functional Diagram
V CC
LX
EN
ENABLE
CONTROL
CIRCUITRY
CONTROL
LOGIC
DRIVER
CURRENT
LIMIT
GND
UVLO
1.25V
BANDGAP
REFERENCE
MINIMUM
t OFF ONE-SHOT
V LIM
REF
MINIMUM
t ON ONE-SHOT
BIAS
GENERATOR
ERROR
OV
COMPARATOR
FB
OV
COMPARATOR
128k ?
96k ?
110k ?
BRT
REF
MAX1553
MAX1554
67k ?
1.25V
SS
2.7V TO 5.5V
INPUT
C1
4.7 μ F
L1
47 μ H
TOKO A920CY-470M
V CC LX
D1
CMDSH2-3
C2
0.47 μ F
25V
R2
200k ?
2.7V TO 5.5V
INPUT
C1
10 μ F
L1
4.7 μ H
MURATA LQH32C
V CC LX
D1
CMDSH1-60M
C2
0.47 μ F
50V
R2
330k ?
ON
OFF
EN
OV
C4
4700pF
D2–D7
ON
OFF
EN
OV
C4
3300pF
MAX1553
R3
10k ?
WHITE
LEDs
MAX1553
R3
10k ?
D2–D10
WHITE
LEDs
PWM
OR
BRT
FB
PWM
OR
BRT
FB
DC CONTROL
C3
0.1 μ F
SS
GND
R1
10 ?
DC CONTROL
C3
0.1 μ F
SS
GND
R1
10 ?
Figure 1. Circuit with the MAX1553 Driving Six White LEDs
Figure 2. Circuit with the MAX1553 Driving Nine White LEDs at
Up to 15mA
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7
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