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参数资料
| 型号： | SP7686AER-L/TR |
| 厂商： | Exar Corporation |
| 文件页数： | 2/16页 |
| 文件大小： | 0K |
| 描述： | IC LED DVR CONST CURRENT 8DFN |
| 标准包装： | 3,000 |
| 恒定电流： | 是 |
| 拓扑： | PWM，降压（降压），升压（升压），切换式电容器（充电泵） |
| 输出数： | 1 |
| 类型 - 主要： | 闪灯/白光，通用 |
| 类型 - 次要： | 高亮度 LED（HBLED），白色 LED |
| 频率： | 2MHz ~ 2.8MHz |
| 电源电压： | 2.7 V ~ 5.5 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-VFDFN 裸露焊盘 |
| 供应商设备封装： | 8-DFN（3x2） |
| 包装： | 带卷 (TR) |
| 工作温度： | -40°C ~ 85°C |
S P 7 6 8 6 / S P 7 6 8 6 A
C o n s t a n t C u r r e n t F l a s h D r i v e r i n D F N 2 m m x 3 m m
ABSOLUTE MAXIMUM RATINGS
These are stress ratings only and functional operation of
the device at these ratings or any other above those
indicated in the operation sections of the specifications
below is not implied. Exposure to absolute maximum
OPERATING RATINGS
Input Voltage Range V IN ............................... 2.7V to 5.5V
Ambient Temperature Range ..................... -40°C to 85°C
Thermal Resistance θ JA ...................................... 59°C/W
rating conditions for extended periods of time may affect
reliability.
V IN ........................................................... -0.6V to 6.0V
C1, C2, EN, CTRL, FB, V OUT .....................-0.6 to V IN +0.3V
Storage Temperature .............................. -65°C to 150°C
Power Dissipation ............................... Internally Limited 1
Lead Temperature (Soldering, 10 sec) ................... 260°C
ESD Rating (HBM - Human Body Model) .................... 2kV
ESD Rating (HBM) EN ........................................... 1.2kV
ELECTRICAL SPECIFICATIONS
Specifications with standard type are for an Operating Temperature of T A = 25°C only; limits applying over the full
Operating Temperature range are denoted by a “?”. Minimum and Maximum limits are guaranteed through test, design, or
statistical correlation. Typical values represent the most likely parametric norm at T A = 25°C, and are provided for reference
purposes only. Unless otherwise indicated, V IN = 3.6V, C IN =10 μ F, C OUT =2.2 μ F, C FLY =0.22 μ F, T A = –40°C to 85°C.
Parameter
Min.
Typ.
Max.
Units
Conditions
Operating V IN Range
Operating Input Current
Shutdown Supply Current
2.7
2
0.01
5.5
3
1
V
mA
μ A
?
Condition 1
V IN = 2.7 – 5.5V, FLASH = 0V, Iload = 100uA
V CRTL < 0.4V for > 350 μ sec,
V EN < 0.4V (SP7686A)
Quiescent Current
FB Voltage for DAC=00000
FB Voltage for DAC=00001
FB Voltage for DAC=11111
FB DAC LSB
300
0
58
350
9.7
μ A
mV
mV
mV
mV
?
V FB = 0mV, DAC=00000
Open loop comparator trip voltage
Open loop comparator trip voltage
FB Voltage Accuracy
-14
14
%
?
Variation from specified V FB
FB voltage (SP7686A, Torch)
FB Voltage (SP7686A, Flash)
FB Pin Current
Switching Frequency
Equivalent Resistance, 1x mode
54
147
2.0
60
160
2.4
0.6
66
173
0.5
2.8
1.4
mV
mV
μ A
MHz
Ω
?
?
?
?
?
Flash = LOW, Open loop comparator trip
voltage
Flash = HIGH, Open loop comparator trip
voltage
V FB =0.3V
Equivalent Resistance, 2x mode
8
Ω
Thermal Regulation
Thermal Shutdown Die Temperature
Thermal Shutdown Hysteresis
140
15
0.01
%/°C
°C
°C
V FB = 60mV
Driver turns off
Driver turns on again
Settle time (TS) after last count
15
50
μ s
Ctrl Input Data Rate
0.5
1
μ s
CTRL minimum pulse width
Wake-up time (TPOR) from Vin off
Wake-up time (TON) from shutdown
600
200
μ s
μ s
?
?
V IN pin low to high, 1 CTRL pulse, V FB =0mV
1 CTRL pulse or (EN pin low to high SP7686A)
Delay time (TDELAY) from 1st to
2nd pulse
Turn-off time (TOFF) into shutdown
25
75
50
μ s
μ s
1 st to 2nd CTRL pulse time delay –
guaranteed by design
EN pin high to low (SP7686A)
Turn-off time (TOFFC )into shutdown
200
350
μ s
?
CTRL pin high to low
Time Duration before shutdown
Logic low voltage
2.8
3.5
4.2
0.4
s
V
?
?
V FB >120mV (SP7686, 11 CTRL pulses),
FLASH= high (SP7686A)
Driver shutdown
? 2010 Exar Corporation
2/16
Rev. 2.1.0
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