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| 型号： | LM2795BL/NOPB |
| 厂商： | National Semiconductor |
| 文件页数： | 3/23页 |
| 文件大小： | 0K |
| 描述： | IC LED DRVR WHT BCKLT 14USMD |
| 标准包装： | 1 |
| 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： | 325kHz ~ 515kHz |
| 电源电压： | 2.7 V ~ 5.5 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 14-VFBGA |
| 供应商设备封装： | 14-uSMD |
| 包装： | 标准包装 |
| 工作温度： | -30°C ~ 85°C |
| 配用： | LM2795EVAL-ND - BOARD EVALUATION LM2795 |
| 其它名称： | LM2795BLDKR |
Absolute Maximum Ratings
V IN
SD
BRGT
(1) (2)
SNVS168L – JANUARY 2002 – REVISED MAY 2013
? 0.5 to 6.2V max
? 0.5 to (V IN +0.3V) w/ 6.2V max
? 0.5 to (V IN +0.3V) w/ 6.2V max
Continuous Power Dissipation
(3)
Internally Limited
T JMAX
θ JA (3)
(3)
(4)
135°C
125°C/W
Storge Temperature
Lead Temp. (Soldering, 5 sec.)
? 65°C to +150°C
260°C
ESD Rating
(5)
Human Body Model
Machine Model
2kV
200V
(1)
(2)
(3)
(4)
(5)
Absolute maximum ratings indicate limits beyond which damage to the device may occur. Electrical specifications do not apply when
operating the device beyond its rated operating conditions.
Military/Aerospace specified devices are required, please contact the Texas Instruments Sales Office/ Distributors for availability and
specifications.
Internal thermal shutdown circuitry protects the device from permanent damage. Thermal shutdown engages at T J =150°C (typ.) and
disengages at T J =140°C (typ.). D1, D2, D3 and D4 may be shorted to GND without damage. P OUT may be shorted to GND for 1sec
without damage.
The value of θ JA is based on a two layer evaluation board with a dimension of 2in. x1.5in.
In the test circuit, all capacitors are 1.0μF, 0.3 ? maximum ESR capacitors. Capacitors with higher ESR will increase output resistance,
reduce output voltage and efficiency.
Operating Conditions
Input Voltage (V IN )
Ambient Temperature (T A )
Junction Temperature (T J )
2.7V to 5.5V
? 30°C to +85°C
? 30°C to +100°C
Electrical Characteristics
Limits in standard typeface are for T J = 25°C and limits in boldface type apply over the full Operating Junction
Temperature Range ( ? 30°C ≤ T J ≤ +100°C). Unless otherwise specified, C1 = C2 = C IN = C HOLD = 1 μF, V IN = 3.6V, BRGT
pin = 0V; R SET =124 ? ; LM2794:V SD = V IN (LM2795: V SD = 0V).
I DX
Symbol
Parameter
Available Current at Output Dx
Conditions
3.0V ≤ V IN ≤ 5.5V
Min
15
Typ
16.8
Max
Units
mA
V DX ≤ 3.8V
BRGT = 50mV
2.7V ≤ V IN ≤ 3.0V
V DX ≤ 3.6V
BRGT = 0V
10
mA
V DX ≤ 3.8V
BRGT = 200mV
20
mA
V DX
Available Voltage at Output Dx
3.0V ≤ V IN ≤ 5.5V
3.8
V
I DX ≤ 15mA
BRGT = 50mV
I DX
Line Regulation of Dx Output
3.0V ≤ V IN ≤ 5.5V
14.18
15.25
16.78
mA
Current
V DX = 3.6V
3.0V ≤ V IN ≤ 4.4V
14.18
15.25
16.32
mA
V DX = 3.6V
I DX
Load Regulation of Dx Output
V IN = 3.6V
14.18
15.25
16.32
mA
Current
3.0V ≤ V DX ≤ 3.8V
I D-MATCH
Current Matching Between Any
V IN = 3.6V, V DX = 3.6V
0.5
%
Two Outputs
I Q
Quiescent Supply Current
3.0V ≤ V IN ≤ 4.2V, Active, No Load
5.5
8.2
mA
Current
R SET = OPEN
I SD
Shutdown Supply Current
3.0V ≤ V IN ≤ 5.5V, Shutdown
2.3
5
μA
Copyright ? 2002–2013, Texas Instruments Incorporated
Product Folder Links: LM2794 LM2795
3
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