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参数资料
| 型号： | MAX8678ETE+T |
| 厂商： | Maxim Integrated |
| 文件页数： | 2/13页 |
| 文件大小： | 0K |
| 描述： | IC LED DRVR WHITE BCKLGT 16-TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 恒定电流： | 是 |
| 拓扑： | PWM，切换式电容器（充电泵） |
| 输出数： | 4 |
| 内部驱动器： | 是 |
| 类型 - 主要： | 背光 |
| 类型 - 次要： | 白色 LED |
| 频率： | 1MHz |
| 电源电压： | 2.7 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 |
White LED Charge Pump with
1.1W Audio Amplifier
ABSOLUTE MAXIMUM RATINGS
IN to GND ..............................................................-0.3V to +6.0V
IN to NEG ..............................................................-0.3V to +6.0V
ENLED, ENAMP, LED_, C+, A+, A-, OUT+, OUT-,
BIAS to GND…….....................................-0.3V to (V IN + 0.3V)
ENLED, ENAMP, LED_, C+, A+, A-, OUT+, OUT-,
BIAS, C- to NEG ...................................…-0.3V to (V IN + 0.3V)
GND to NEG ......................................................…-0.3V to +6.0V
OUT+, OUT- Short Circuit to GND or IN ....................Continuous
Continuous Power Dissipation (T A = +70°C)
16-Pin Thin QFN 3mm x 3mm
(derate 17.5mW/°C above +70°C) ............................1398mW
Junction Temperature ......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
GND to C-..............................................................-0.3V to +6.0V
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(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
IN Operating Voltage
Undervoltage-Lockout (UVLO) Threshold
V IN rising
CONDITIONS
MIN
2.7
2.25
TYP
2.45
MAX
5.5
2.65
UNITS
V
V
UVLO Hysteresis
100
mV
Shutdown Supply Current
(All Outputs Off)
ENLED = ENAMP =
GND
T A = +25°C
T A = +85°C
0.1
0.1
1.5
μA
Charge pump inactive, LED_ = 1.6mA
ENAMP = GND, T A = +25°C
140
200
μA
No-Load Supply Current
Thermal Shutdown
Thermal-Shutdown Hysteresis
Charge pump active, 1MHz switching, LEDs at
24mA setting, ENAMP = GND
ENAMP = IN, ENLED = GND
0.45
3
+160
20
mA
°C
°C
SERIAL-PULSE INTERFACE (EN_)
Logic Input-High Voltage
Logic Input-Low Voltage
V IN = 2.7V to 4.2V
V IN = 4.2V to 5.5V
V IN = 2.7V to 5.5V
1.4
1.5
0.4
V
V
Logic Input Current
t SHDN
t HOLD
t LO
t HI
V IL = 0V or
V IH = 5.5V
See Figures 2 and 3
See Figures 2 and 3
See Figures 2 and 3
See Figures 2 and 3
T A = +25°C
T A = +85°C
0.5
0.5
0.01
0.1
1
3.2
3.2
500
500
μA
ms
ms
μs
μs
CHARGE PUMP
Switching Frequency
Soft-Start Time
Regulation Voltage (OVP) (V IN - V NEG )
1
0.1
5
MHz
ms
V
Open-Loop NEG Output Resistance
((V NEG -V IN )/I NEG )
10
23
Ω
Guaranteed Output Current
NEG Discharge Resistance in Shutdown
LED V F = 3.9V, V IN = 3.2V
All LEDs off, ENLED = GND
96
10
mA
k Ω
2
_______________________________________________________________________________________
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