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参数资料
| 型号： | LT1768IGN |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 稳压器 |
| 英文描述： | High Power CCFL Controller for Wide Dimming Range and Maximum Lamp Lifetime |
| 中文描述： | 1.5 A FLUORESCENT LIGHT CONTROLLER, 410 kHz SWITCHING FREQ-MAX, PDSO16 |
| 封装： | 0.150 INCH, PLASTIC, SSOP-16 |
| 文件页数： | 8/20页 |
| 文件大小： | 301K |
| 代理商： | LT1768IGN |
LT1768
8
PI
FU
CTIO
N
S
U
U
R
MAX
(Pin 10):
The R
MAX
pin outputs a regulated voltage
of 1.25V that is to be loaded with an external resistor. The
current through the external resistor sets the maximum
lamp current. Maximum lamp current in a dual lamp
application will be approximately equal to 100 times I
RMAX
when the voltage on the PROG pin is greater than 4V. The
value of R
RMAX
must be greater than 5K and less than
[R
RMIN
2.5 (V
PWM–1
/3)] for proper PWM operation.
R
MIN
(Pin 11):
The R
MIN
pin outputs a regulated voltage of
1.26V that is to be loaded with an external resistor. The
current through the external resistor sets the minimum
lamp current. Minimum lamp current in a dual lamp
application will be approximately 10 times the value of
I
RMIN
when the voltage on the PROG pin is between 0.5V
and 1V. To set the minimum current to zero (I
RMIN
= 0
μ
A)
for maximum dimming range, connect the R
MIN
pin to the
V
REG
pin. The value of R
RMIN
(R
RMIN
=
∞
when R
MIN
is
connected to V
REG
) must be greater than the value of
R
RMAX
/[0.4 (V
PWM–1
)/3] for proper PWM operation.
SHDN (Pin 12):
The SHDN pin controls the operation of
the LT1768. Pulling the SHDN pin above 1.26V or leaving
the pin open will result in normal operation of the LT1768.
Pulling the SHDN pin below 1V causes a complete shut-
down of the LT1768 which results in a typical quiescent
current of 65
μ
A. The SHDN pin has an internal 7
μ
A pull-up
source to V
IN
and 200mV of voltage hysteresis.
FAULT (Pin 13):
The FAULT pin is an open collector output
with a sink capability of 1mA that is activated when lamp
current falls below 125
μ
A in either DIO1 or DIO2 for at least
1 full PWM cycle.
V
REF
(Pin 14):
The V
REF
pin is a regulated 5V output that is
derived from the V
IN
pin. The regulated voltage provides up
to 10mA of current to power external circuitry. During
undervoltage lockout, shutdown mode or thermal
shutdown, drive to the V
REF
pin will be disabled.
V
IN
(Pin 15):
The V
IN
pin is the voltage supply pin for the
LT1768. For normal operation, the V
IN
pin must be above an
undervoltage lockout of 7.9V and below a maximum of 24V.
GATE (Pin 16):
The GATE pin is the output of a NPN high
current output stage used to drive the gate of an external
MOSFET. It has a dynamic source and sink capability of
1.5A. During normal operation, the GATE pin is driven high
at the beginning of each oscillator period and then low
when the appropriate current in the switch is reached. The
GATE pin has a minimum on time of 125ns and a maximum
duty cycle of 93% at a frequency of 350kHz. For input
voltages less than 13V the gate will be driven to within 2V
of V
IN
. For input voltages greater than 13V the gate pin high
level will be clamped at a typical voltage of 12.5V.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LT1768IGN#PBF | 功能描述:IC CTRLR CCFL SGL/MULT HP 16SSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 照明，镇流器控制器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 类型:CCFL 控制器 频率:40 ~ 80 kHz 电流 - 电源:5mA 电流 - 输出:- 电源电压:4.5 V ~ 5.5 V 工作温度:-40°C ~ 85°C 封装/外壳:16-SOIC（0.154"，3.90mm 宽） 供应商设备封装:16-SOIC 包装:带卷 (TR) 其它名称:90-3991V+V01 |
| LT1768IGN#TR | 功能描述:IC CTRLR CCFL SGL/MULT HP 16SSOP RoHS:否 类别:集成电路 (IC) >> PMIC - 照明，镇流器控制器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 类型:CCFL 控制器 频率:40 ~ 80 kHz 电流 - 电源:5mA 电流 - 输出:- 电源电压:4.5 V ~ 5.5 V 工作温度:-40°C ~ 85°C 封装/外壳:16-SOIC（0.154"，3.90mm 宽） 供应商设备封装:16-SOIC 包装:带卷 (TR) 其它名称:90-3991V+V01 |
| LT1768IGN#TRPBF | 功能描述:IC CTRLR CCFL SGL/MULT HP 16SSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 照明，镇流器控制器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 类型:CCFL 控制器 频率:40 ~ 80 kHz 电流 - 电源:5mA 电流 - 输出:- 电源电压:4.5 V ~ 5.5 V 工作温度:-40°C ~ 85°C 封装/外壳:16-SOIC（0.154"，3.90mm 宽） 供应商设备封装:16-SOIC 包装:带卷 (TR) 其它名称:90-3991V+V01 |
| LT1769 | 制造商:LINER 制造商全称:Linear Technology 功能描述:4A, High Efficiency, Standalone Li Battery Charger |
| LT1769CFE | 功能描述:IC BATT CHRGR CNSTNT I/V 20TSSOP RoHS:否 类别:集成电路 (IC) >> PMIC - 电池管理 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 功能:电池监控器 电池化学:碱性，锂离子，镍镉，镍金属氢化物 电源电压:1 V ~ 5.5 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:SOT-23-6 供应商设备封装:SOT-6 包装:带卷 (TR) |
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