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参数资料
| 型号： | LTC3723EGN-2#TR |
| 厂商： | Linear Technology |
| 文件页数： | 15/20页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR FLYBK ISO VM 16SSOP |
| 标准包装： | 2,500 |
| PWM 型： | 电压模式 |
| 输出数： | 1 |
| 频率 - 最大： | 1MHz |
| 占空比： | 50% |
| 电源电压： | 10V（最小值） |
| 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 ~ 85°C |
| 封装/外壳： | 16-SSOP（0.154"，3.90mm 宽） |
| 包装： | 带卷 (TR) |
LTC3723-1/LTC3723-2
OPERATIO
High Current Drivers
The LTC3723-1/LTC3723-2 high current, high speed driv-
ers provide direct drive of external power N-channel
MOSFET switches. The drivers swing from rail to rail. Due
to the high pulsed current nature of these drivers (1.5A
sink, 1A source), care must be taken with the board layout
to obtain advertised performance. Bypass V CC with a 1 μ F
minimum, low ESR, ESL ceramic capacitor. Connect this
capacitor with minimal length PCB leads to both V CC and
GND. A ground plane is highly recommended. The driver
output pins (DRVA, DRVB) connect to the gates of the
external MOSFET switches. The PCB traces making these
connections should also be as short as possible to mini-
mize overshoot and undershoot of the drive signal.
Synchronous Rectification
The LTC3723-1/LTC3723-2 produces the precise timing
signals necessary to control secondary side synchronous
rectifier MOSFETs on SDRA and SDRB. Synchronous
new primary side power delivery pulse. This feature pro-
vides optimized timing for the synchronous MOSFETs
which improves efficiency. At higher load currents it
becomes more advantageous to delay the turn-off of the
synchronous rectifiers until the beginning of the new
power pulse. This allows for secondary freewheeling
current to flow through the synchronous MOSFET channel
instead of its body diode.
The turn-off delay is programmed with a resistor from
SPRG to GND, (Figure 13). The nominal regulated voltage
on SPRG is 2V. The external resistor programs a current
which flows out of SPRG. The delay can be adjusted from
approximately 20ns to 200ns, with resistor values of 10k
to 200k. Do not leave SPRG floating. The amount of delay
can also be modulated based on an external current
source that sinks current out of SPRG. Care must be taken
to limit the current out of SPRG to 350 μ A or less.
SPRG
rectifiers are used in place of Schottky or silicon diodes on
the secondary side to improve converter efficiency. As
MOSFET R DS(ON) levels continue to drop, significant effi-
R SPRG
+
V 2V
–
+
–
TURN-OFF
SYNC OUT
ciency improvements can be realized with synchronous
rectification, provided that the MOSFET switch timing is
optimized. Synchronous rectification also provides bipo-
Figure 13. Synchronous Delay Circuitry
372312 F13
lar output current capability, that is, the ability to sink as
well as source current.
Programming the Synchronous Rectifier
Turn-Off Delay
The LTC3723-1/LTC3723-2 controllers include a feature
to program the turn-off edge of the secondary side syn-
chronous rectifier MOSFETs relative to the beginning of a
372312f
15
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| LTC3725EMSE#PBF | 功能描述:IC SECONDARY SIDE CTRLR 10MSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 电源控制器，监视器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 应用:多相控制器 输入电压:- 电源电压:9 V ~ 14 V 电流 - 电源:- 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:40-WFQFN 裸露焊盘 供应商设备封装:40-TQFN-EP（5x5） 包装:带卷 (TR) |
| LTC3725EMSE#TRPBF | 功能描述:IC SECONDARY SIDE CTRLR 10MSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 电源控制器，监视器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 应用:多相控制器 输入电压:- 电源电压:9 V ~ 14 V 电流 - 电源:- 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:40-WFQFN 裸露焊盘 供应商设备封装:40-TQFN-EP（5x5） 包装:带卷 (TR) |
| LTC3725IMSE | 制造商:Linear Technology 功能描述:DC DC Cntrlr Single-OUT Synchronous Forward Controller 9V Input 10-Pin MSOP EP |
| LTC3725IMSE#PBF | 功能描述:IC SECONDARY SIDE CTRLR 10MSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 电源控制器，监视器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 应用:多相控制器 输入电压:- 电源电压:9 V ~ 14 V 电流 - 电源:- 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:40-WFQFN 裸露焊盘 供应商设备封装:40-TQFN-EP（5x5） 包装:带卷 (TR) |
| LTC3725IMSE#TRPBF | 功能描述:IC SECONDARY SIDE CTRLR 10MSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 电源控制器，监视器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 应用:多相控制器 输入电压:- 电源电压:9 V ~ 14 V 电流 - 电源:- 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:40-WFQFN 裸露焊盘 供应商设备封装:40-TQFN-EP（5x5） 包装:带卷 (TR) |
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