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參數(shù)資料
| 型號： | LTC3806 |
| 廠商： | Linear Technology Corporation |
| 英文描述： | Synchronous Flyback DC/DC Controller |
| 中文描述： | 同步反激式DC / DC控制器 |
| 文件頁數(shù)： | 1/20頁 |
| 文件大小： | 241K |
| 代理商： | LTC3806 |
1
LTC3806
3806f
Synchronous
Flyback DC/DC Controller
I
High Efficiency at Full Load
I
Better Cross Regulation Than Nonsynchronous
Converters (Multiple Outputs)
I
Soft-Start Minimizes Inrush Current
I
Current Mode Control Provides Excellent
Transient Response
I
High Maximum Duty Cycle: 89% Typical
I
±
2% Programmable Undervoltage Lockout Threshold
I
±
1% Internal Voltage Reference
I
Micropower Start-Up
I
Constant Frequency Operation (Never Audible)
I
3mm
×
4mm 12-Pin DFN Package
I
48V Telecom Supplies
I
12V/42V Automotive
I
24V Industrial
I
VoIP Phone
I
Power Over Ethernet
The LTC
3806 is a current mode synchronous flyback
controller that drives N-channel power MOSFETs and
requires very few external components. It is intended for
medium power applications where multiple outputs are
required. Synchronous rectification provides higher effi-
ciency and improved output cross regulation than
nonsynchronous converters.
The IC contains all the necessary control circuitry includ-
ing a 250kHz oscillator, precision undervoltage lockout
circuit with hysteresis, gate drivers for primary and syn-
chronous switches, current mode control circuitry and
soft-start circuitry.
Programmable soft-start reduces inrush currents. This
makes it easier to design compliant Power Over Ethernet
supplies.
Low start-up current reduces power dissipation in the
start-up resistor and reduces the size of the external start-
up capacitor.
The LTC3806 is available in a 12-pin, exposed pad DFN
package.
, LTC and LT are registered trademarks of Linear Technology Corporation.
SENSE
SS
G2
G1
GND
RUN
I
TH
FB
V
IN
INTV
CC
LTC3806
D1
T1
C3
4.7
μ
F
C4
0.47
μ
F
C5
470
μ
F
C6
470
μ
F
3806 F01
M1
M2
M3
V
3.3V
3A
V
2.5V
3A
C2
1nF
C7
4.7
μ
F
C1
100
μ
F
R4
3.4k
R5
0.056
R7
12.4k
R6
21k
R3
26.7k
R8
100
R2
604k
R1
51k
V
IN
36V TO 72V
Figure 1. Multiple Output Flyback Converter for Telecom
FEATURES
DESCRIPTIOU
APPLICATIU
TYPICAL APPLICATIO
U
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LTC3806EDE | 功能描述:IC REG CTRLR FLYBACK PWM 12-DFN RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 標準包裝:2,500 系列:- PWM 型:電流模式 輸出數(shù):1 頻率 - 最大:500kHz 占空比:96% 電源電壓:4 V ~ 36 V 降壓:無 升壓:是 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:無 工作溫度:-40°C ~ 125°C 封裝/外殼:24-WQFN 裸露焊盤 包裝:帶卷 (TR) |
| LTC3806EDE#PBF | 功能描述:IC REG CTRLR FLYBACK PWM 12-DFN RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 標準包裝:2,500 系列:- PWM 型:電流模式 輸出數(shù):1 頻率 - 最大:500kHz 占空比:96% 電源電壓:4 V ~ 36 V 降壓:無 升壓:是 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:無 工作溫度:-40°C ~ 125°C 封裝/外殼:24-WQFN 裸露焊盤 包裝:帶卷 (TR) |
| LTC3806EDE#TR | 功能描述:IC REG CTRLR FLYBACK PWM 12-DFN RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 標準包裝:2,500 系列:- PWM 型:電流模式 輸出數(shù):1 頻率 - 最大:500kHz 占空比:96% 電源電壓:4 V ~ 36 V 降壓:無 升壓:是 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:無 工作溫度:-40°C ~ 125°C 封裝/外殼:24-WQFN 裸露焊盤 包裝:帶卷 (TR) |
| LTC3806EDE#TRPBF | 功能描述:IC REG CTRLR FLYBACK PWM 12-DFN RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 標準包裝:2,500 系列:- PWM 型:電流模式 輸出數(shù):1 頻率 - 最大:500kHz 占空比:96% 電源電壓:4 V ~ 36 V 降壓:無 升壓:是 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:無 工作溫度:-40°C ~ 125°C 封裝/外殼:24-WQFN 裸露焊盤 包裝:帶卷 (TR) |
| LTC3808EDE | 制造商:Linear Technology 功能描述:DC DC Cntrlr Single-OUT Sync Step Down 2.75V to 9.8V Input 14-Pin DFN EP |
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