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参数资料
| 型号： | LTC3803ES6-5#TRMPBF |
| 厂商： | Linear Technology |
| 文件页数： | 11/16页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR FLYBK PWM TSOT23-6 |
| 标准包装： | 500 |
| PWM 型： | 电流模式 |
| 输出数： | 1 |
| 频率 - 最大： | 230kHz |
| 占空比： | 90% |
| 电源电压： | 4 V ~ 8.1 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 ~ 125°C |
| 封装/外壳： | SOT-23-6 细型，TSOT-23-6 |
| 包装： | 带卷 (TR) |
| 相关产品： | 732-2263-6-ND - TRANS FLYBACK LTC3803 16.9UH 732-2263-1-ND - TRANS FLYBACK LTC3803 16.9UH 732-2263-2-ND - TRANS FLYBACK LTC3803 16.9UH |
| 其它名称： | LTC3803ES6-5#PBF LTC3803ES6-5#PBF-ND |
LTC3803-5
APPLICATIONS INFORMATION
to duty cycle. This stabilizes the control loop against
subharmonic oscillation. The amount of reduction in the
current comparator threshold (ΔV SENSE ) can be calculated
using the following equation:
GND to drop enough voltage across R VCC to regulate
V CC to around 8.1V. For applications where V IN is low
enough such that the static power dissipation in R VCC is
acceptable, using the V CC shunt regulator is the simplest
Δ V SENSE =
Duty Cycle – 6.5%
73.5%
? 5 μ A ? R SL
way to power the LTC3803-5.
EXTERNAL PREREGULATOR
Note: LTC3803-5 enforces 6.5% < Duty Cycle < 80%.
A good starting value for R SL is 5.9k, which gives a 30mV
drop in current comparator threshold at 80% duty cycle.
Designs not needing slope compensation may replace
R SL with a short circuit.
V CC SHUNT REGULATOR
The circuit in Figure 4 shows another way to power the
LTC3803-5. An external series preregulator consisting
of series pass transistor Q1, Zener diode D1, and bias
resistor R B brings V CC above the V CC turn-on threshold,
enabling the LTC3803-5.
8V TO
75 V IN
An internal shunt regulator allows the LTC3803-5 to be
powered through a single dropping resistor from V IN to
V CC , in conjunction with a bypass capacitor, C VCC , that
closely decouples V CC to GND (see Figure 3). The shunt
R B
100k
D1
6.8V
Q1
MMBTA42
C VCC
0.1μF
LTC3803-5
V CC
GND
regulator can draw up to 25mA through the V CC pin to
38035 F04
V IN
Figure 4. Powering the LTC3803-5
R VCC
C VCC
LTC3803-5
V CC
GND
with an External Preregulator
38035 F03
Figure 3. Powering the LTC3803-5
Via the Internal Shunt Regulator
38035fd
11
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| LTC3803ES6#TRPBF | IC REG CTRLR FLYBK PWM TSOT23-6 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC3803ES6TRMPBF | 制造商:Linear Technology 功能描述:DC-DC Controller Flyback 75V TSOT23-6 |
| LTC3803HS6#PBF | 制造商:Linear Technology 功能描述:DC DC Cntrlr Single-OUT Flyback Controller 6-Pin TSOT-23 Bulk 制造商:Linear Technology 功能描述:Switching Regulator IC 制造商:Linear Technology 功能描述:IC, FLYBACK DC/DC CONTROLLER, 6-TSOT-23; Primary Input Voltage:72V; No. of Outputs:1; Output Current:1A; No. of Pins:6; Operating Temperature Min:-40C; Operating Temperature Max:150C; MSL:MSL 1 - Unlimited; Output Current Max:2A ;RoHS Compliant: Yes |
| LTC3803HS6#TRMPBF | 功能描述:IC REG CTRLR FLYBK PWM TSOT23-6 RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 特色产品:LM3753/54 Scalable 2-Phase Synchronous Buck Controllers 标准包装:1 系列:PowerWise® PWM 型:电压模式 输出数:1 频率 - 最大:1MHz 占空比:81% 电源电压:4.5 V ~ 18 V 降压:是 升压:无 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:无 工作温度:-5°C ~ 125°C 封装/外壳:32-WFQFN 裸露焊盘 包装:Digi-Reel® 产品目录页面:1303 (CN2011-ZH PDF) 其它名称:LM3754SQDKR |
| LTC3803HS6#TRPBF | 功能描述:IC REG CTRLR FLYBK PWM TSOT23-6 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) |
| LTC3803HS6-3#PBF | 制造商:Linear Technology 功能描述:Bulk |
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