- 您现在的位置：买卖IC网 > PDF目录15304 > LT3837EFE#TRPBF (Linear Technology)IC REG CTRLR FLYBK ISO 16-TSSOP PDF资料下载
参数资料
| 型号： | LT3837EFE#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 6/28页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR FLYBK ISO 16-TSSOP |
| 标准包装： | 2,500 |
| PWM 型： | 电流模式 |
| 输出数： | 1 |
| 频率 - 最大： | 250kHz |
| 占空比： | 88% |
| 电源电压： | 4.5 V ~ 20 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： | 是 |
| 工作温度： | -40°C ~ 125°C |
| 封装/外壳： | 16-TSSOP（0.173"，4.40mm）裸露焊盘 |
| 包装： | 带卷 (TR) |
第1页第2页第3页第4页第5页当前第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页
LT3837
TYPICAL PERFORMANCE CHARACTERISTICS
PG Delay Time vs Temperature
Enable Delay Time vs Temperature
300
320
R ENDLY = 90k
250
200
150
100
50
R PGDLY = 27.4k
R PGDLY = 16.9k
300
280
260
240
220
0
–50
–25
0
25
50
75
100
125
200
–50 –25
0
25
50
75
100
125
TEMPERATURE (°C)
3837 G19
PIN FUNCTIONS
SG (Pin 1): Synchronous gate drive output. This pin pro-
vides an output signal for a secondary-side synchronous
switch. Large dynamic currents may flow during voltage
transitions. See the Applications Information section for
details.
V CC (Pin 2): Supply voltage pin. Bypass this pin to ground
with a 4.7μF capacitor or more.
t ON (Pin 3): Pin for external programming resistor to set
the minimum time that the primary switch is on for each
cycle. Minimum turn-on facilitates the isolated feedback
method. See the Applications Information section for
details.
ENDLY (Pin 4): Pin for external programming resistor to
set enable delay time. The enable delay time disables the
feedback amplifier for a fixed time after the turn-off of the
primary-side MOSFET. This allows the leakage inductance
voltage spike to be ignored for flyback voltage sensing.
See the Applications Information section for details.
TEMPERATURE (°C)
3837 G20
SFST (Pin 6): This pin, in conjunction with a capacitor to
ground, controls the ramp-up of peak primary current as
sensed through the sense resistor. This is used to control
converter inrush current at start-up. The V C pin voltage
cannot exceed the SFST pin voltage, so as SFST increases,
the maximum voltage on V C increases commensurately,
allowing higher peak currents. Total V C ramp time is ap-
proximately 70ms per μF of capacitance. Leave pin open
if not using the soft-start function.
OSC (Pin 7): This pin in conjunction with an external
capacitor defines the controller oscillator frequency. The
frequency is approximately 100kHz ? 100/C OSC (pF).
FB (Pin 8): Pin for the feedback node for the power supply
feedback amplifier. Feedback is sensed via a transformer
winding and enabled during the flyback period. This pin
also sinks additional current to compensate for load current
variation as set by the R CMP pin. Keep the Thevenin equiva-
lent resistance of the feedback divider at roughly 3k.
SYNC (Pin 5): Pin for synchronizing the internal oscillator
with an external clock. The positive edge on a pulse causes
the oscillator to discharge causing PG to go low (off) and
SG high (on). The sync threshold is typically 1.53V. See
the Applications Information section for details. Tie to
ground if unused.
3837fd
6
相关PDF资料 |
PDF描述 |
|---|---|
| GBM43DCBS | CONN EDGECARD 86POS R/A .156 SLD |
| UVY1E102MPD | CAP ALUM 1000UF 25V 20% RADIAL |
| VE-J2X-EY-F1 | CONVERTER MOD DC/DC 5.2V 50W |
| LTC1735CF#TR | IC REG CTRLR BUCK PWM CM 20TSSOP |
| IMC1210EB82NJ | INDUCTOR WW 82NH 5% 1210 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LT3837IFE#PBF | 功能描述:IC REG CTRLR FLYBK ISO 16-TSSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 标准包装:2,500 系列:- PWM 型:电流模式 输出数:1 频率 - 最大:500kHz 占空比:96% 电源电压:4 V ~ 36 V 降压:无 升压:是 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:无 工作温度:-40°C ~ 125°C 封装/外壳:24-WQFN 裸露焊盘 包装:带卷 (TR) |
| LT3837IFE#TRPBF | 功能描述:IC REG CTRLR FLYBK ISO 16-TSSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 标准包装:2,500 系列:- PWM 型:电流模式 输出数:1 频率 - 最大:500kHz 占空比:96% 电源电压:4 V ~ 36 V 降压:无 升压:是 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:无 工作温度:-40°C ~ 125°C 封装/外壳:24-WQFN 裸露焊盘 包装:带卷 (TR) |
| LT383L313 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Optoelectronic |
| LT3844 | 制造商:LINER 制造商全称:Linear Technology 功能描述:High Voltage, Current Mode Switching Regulator Controller with Programmable Operating Frequency |
| LT3844EFE | 制造商:LINER 制造商全称:Linear Technology 功能描述:High Voltage, Current Mode Switching Regulator Controller with Programmable Operating Frequency |
发布紧急采购，3分钟左右您将得到回复。