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参数资料
| 型号： | LTC3806EDE#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 3/20页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR FLYBACK PWM 12-DFN |
| 标准包装： | 91 |
| PWM 型： | 电流模式 |
| 输出数： | 1 |
| 频率 - 最大： | 290kHz |
| 占空比： | 94% |
| 电源电压： | 10 V ~ 75 V |
| 降压： | 无 |
| 升压： | 无 |
| 回扫： | 是 |
| 反相： | 无 |
| 倍增器： | 无 |
| 除法器： | 无 |
| Cuk： | 无 |
| 隔离： | 无 |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 12-WFDFN 裸露焊盘 |
| 包装： | 管件 |
LTC3806
ELECTRICAL CHARACTERISTICS The ● denotes specifications which apply over the full operating
temperature range, otherwise specifications are T A = 25 ° C. V IN = 10V, V RUN = 1.5V, unless otherwise specified.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
V SENSE(MAX) Maximum Current Sense Input Threshold
110
150
190
mV
I SENSE(ON)
I SENSE(OFF)
SENSE Pin Current (G1 High)
SENSE Pin Current (G1 Low)
V SENSE = 0V
V SENSE = 1V
35
0.1
50
5
μ A
μ A
I SS
SS Pin Source Current
V SS = 1.5V
3
5
8
μ A
Oscillator
f OSC
DC(MAX)
Oscillator Frequency
Maximum Duty Cycle
210
84
250
89
290
94
kHz
%
Regulator
V INTVCC
Δ INTV CC
Δ V IN
V LDO(LOAD)
V UVL+
V UVL–
INTV CC Regulator Output Voltage
INTV CC Regulator Line Regulation
INTV CC Load Regulation
Rising V IN Threshold Voltage
Falling V IN Threshold Voltage
V IN = 10V
10V ≤ V IN ≤ 20V
0 ≤ I INTVCC ≤ 20mA
6
–6
14
7.5
6.9
–3
15
8
7.8
100
16
8.5
V
mV
%
V
V
Gate Drivers
t r1
t f1
t r2
t f2
t DEAD
Gate Driver 1 Output Rise Time
Gate Driver 1 Output Fall Time
Gate Driver 2 Output Rise Time
Gate Driver 2 Output Fall Time
Gate Driver Dead Time
C L1 = 3300pF
C L1 = 3300pF
C L2 = 4700pF
C L2 = 4700pF
C L1 = 3300pF, C L2 = 4700pF
25
18
25
18
100
100
100
100
100
ns
ns
ns
ns
ns
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 LTC3806E is guaranteed to meet performance specifications
from 0 ° C to 70 ° C. Specifications over the – 40 ° C to 85 ° C operating
temperature range are assured by design, characterization and correlation
with statistical process controls.
Note 3: T J is calculated from the ambient temperature T A and power
Note 4: The minimum operating voltage is allowed once operation begins.
To begin operation, V IN must be above the rising undervoltage lockout
threshold with V RUN above the rising RUN input threshold.
Note 5: The dynamic input supply current is higher due to power MOSFET
gate charging (Q G ? f OSC ). See Applications Information.
Note 6: The LTC3806 is tested in a feedback loop which servos V FB to the
reference voltage with the I TH pin forced to a voltage between 0V and 1.4V
(the no load to full load operating voltage range for the I TH pin is 0.3V to
1.23V).
dissipation P D according to the following formula:
T J = T A + (P D ? 34 ° C/W)
3806fb
3
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