参数资料
型号: MAX8648ETE+T
厂商: Maxim Integrated
文件页数: 4/15页
文件大小: 0K
描述: IC LED DRVR WT/RGB BCKLGT 16TQFN
产品培训模块: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
标准包装: 2,500
恒定电流:
拓扑: PWM,切换式电容器(充电泵)
输出数: 6
内部驱动器:
类型 - 主要: 背光
类型 - 次要: RGB,白色 LED
频率: 1MHz
电源电压: 1.7 V ~ 5.5 V
输出电压: 5V
安装类型: 表面贴装
封装/外壳: 16-WFQFN 裸露焊盘
供应商设备封装: 16-TQFN(3x3)
包装: 带卷 (TR)
工作温度: -40°C ~ 85°C
Ultra-Efficient Charge Pumps for
Six White/RGB LEDs in 3mm x 3mm Thin QFN
ELECTRICAL CHARACTERISTICS (continued)
(V VDD = V IN = 3.6V, V GND = 0V, T A = -40°C to +85°C, unless otherwise noted. Typical values are at T A = +25°C.) (Note 1)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Derating-Function Start Temperature
+60
°C
Derating-Function Slope
LED_ R DSON
From derating-function start temperature
Not utilizing the charge pump
Utilizing the charge pump
-2.5
3
4
%/°C
Ω
LED_ Dropout
LED_ Current Regulator Switchover
Threshold (Inactive to Active)
24mA setting
(Note 3)
V LED_ falling
Not utilizing the charge pump
Utilizing the charge pump
125
60
90
150
120
200
175
mV
mV
LED_ Current Regulator Switchover
Hysteresis
100
mV
LED_ Leakage in Shutdown
All LEDs off
T A = +25°C
T A = +85°C
0.01
0.1
5
μA
Note 1: Limits are 100% production tested at T A = +25°C. Specifications over the operating temperature range are guaranteed by design.
Note 2: Guaranteed by design.
Note 3: LED dropout voltage is defined as the LED_ to GND voltage at which current into LED_ drops 10% from the value at V LED_ = 0.5V.
Typical Operating Characteristics
(V IN = 3.6V, V EN_ = V IN , circuit of Figure 1, T A = +25°C, unless otherwise noted.)
100
90
80
EFFICIENCY vs. SUPPLY VOLTAGE
(DRIVING SIX MATCHED LEDs)
100
90
EFFICIENCY vs. Li+ BATTERY VOLTAGE
(DRIVING SIX MATCHED LEDs)
100
90
80
EFFICIENCY vs. SUPPLY VOLTAGE
(DRIVING SIX LEDs)
70
60
20.8mA/LE D
80
70
60
50
40
30
20
1.6mA/LED
16mA/LED
6.4mA/LED
70
60
50
1.6mA/LED
20.8mA/LED
16mA/LED
6.4mA/LED
50
40
30
20
1.6mA/LED
16mA/LED
10
0
40
10
0
LEDs HAVE MISMATCHED V F
2.7
3.0
3.3
3.6
3.9
4.2
4.2 3.9
3.8
3.7
3.6
3.5 3.4 3.0
2.7
3.0
3.3
3.6
3.9
4.2
INPUT VOLTAGE (V)
Li+ BATTERY VOLTAGE (V, TIME-WEIGHTED)
INPUT VOLTAGE (V)
4
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