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参数资料
| 型号： | LTC3783IFE#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 4/24页 |
| 文件大小： | 0K |
| 描述： | IC LED DRVR PWM CONTROL 16-TSSOP |
| 标准包装： | 95 |
| 恒定电流： | 是 |
| 恒定电压： | 是 |
| 拓扑： | 回扫，PWM，SEPIC，降压（降压），升压（升压） |
| 输出数： | 1 |
| 内部驱动器： | 无 |
| 类型 - 主要： | 车载，通用 |
| 频率： | 20kHz ~ 1MHz |
| 电源电压： | 3 V ~ 36 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-TSSOP（0.173"，4.40mm）裸露焊盘 |
| 供应商设备封装： | 16-TSSOP-EP |
| 包装： | 管件 |
| 工作温度： | -40°C ~ 125°C |
LTC3783
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating temperature
range, otherwise specifications are T A = 25°C. V IN = 12V, V RUN = 1.5V, V SYNC = 0V, V FBP = V REF , R T = 20k, unless otherwise specified.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
R SYNC
SYNC Input Pull-Down Resistance
100
kΩ
t ON(MIN)
Minimum On-Time
With Sense Resistor, 10mV Overdrive
No R SENSE Mode
170
300
ns
ns
Low Dropout Regulator
V INTVCC
UVLO
? V INTVCC
? V IN
? V LDO(LOAD)
V DROPOUT
INTV CC Regulator Output Voltage
INTV CC Undervoltage Lockout
Thresholds
INTV CC Line Regulation
INTV CC Load Regulation
INTV CC Dropout Voltage
V OV/FB = 1.5V
Rising INTV CC
Falling INTV CC
Hysteresis
12V ≤ V IN ≤ 36V
0 ≤ I INTVCC ≤ 10mA
V IN = 7V, I INTVCC = 10mA
l
6.5
1.8
–1
7
2.3
2.1
0.2
2
–0.1
300
7.5
2.5
6
500
V
V
V
V
mV/V
%
mV
I INTVCC(SD)
Bootstrap Mode INTV CC Supply
Current in Shutdown
V SENSE = 0V
V SENSE = 7V
25
15
μA
μA
GATE/PWMOUT Drivers
t r(GATE)
t f(GATE)
I PK(GATE,RISE)
I PK(GATE,FALL)
V PWMIN
R PWMIN
t r(PWMOUT)
t f(PWMOUT)
I PK(PWMOUT,RISE)
I PK(PWMOUT,FALL)
GATE Driver Output Rise Time
GATE Driver Output Fall Time
GATE Driver Peak Current Sourcing
GATE Driver Peak Current Sinking
PWMIN Pin Input Threshold Voltages
PWMIN Input Pull-Up Resistance
PWMOUT Driver Output Rise Time
PWMOUT Driver Output Fall Time
PWMOUT Driver Peak Current Sourcing
PWMOUT Driver Peak Current Sinking
C L = 3300pF (Note 7)
C L = 3300pF (Note 7)
V GATE = 0V
V GATE = 7V
Rising PWMIN
Falling PWMIN
Hysteresis
C L = 3300pF (Note 7)
C L = 3300pF (Note 7)
V PWMOUT = 0V
V PWMOUT = 7V
15
8
0.5
1
1.6
0.8
0.8
100
30
16
0.25
0.50
ns
ns
A
A
V
V
V
kΩ
ns
ns
A
A
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: The LTC3783E is guaranteed to meet performance specifications
over the 0°C to 85°C operating temperature range. Specifications over
the –40°C to 85°C operating temperature range are assured by design,
characterization and correlation with statistical process controls. The
LTC3783I is guaranteed to meet performance specifications over the full
–40°C to 125°C operating temperature range.
Note 3: T J is calculated from the ambient temperature T A and power
dissipation P D according to the following formula:
Note 4: The dynamic input supply current is higher due to power MOSFET
gate charging (Q G ? f OSC ). See Operation section.
Note 5: The LTC3783 is tested in a feedback loop which servos V FBN to
V FBP = V VREF with the I TH pin forced to the midpoint of its voltage range
(0.3V ≤ V ITH ≤ 1.2V; midpoint = 0.75V).
Note 6: In a synchronized application, the internal slope compensation is
increased by 25%. Synchronizing to a significantly higher ratio will reduce
the effective amount of slope compensation, which could result in sub-
harmonic oscillation for duty cycles greater than 50%
Note 7 : Rise and fall times are measured at 10% and 90% levels.
T J = T A + (P D ? 43°C/W) for the DFN
T J = T A + (P D ? 38°C/W) for the TSSOP
3783fb
4
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