Datasheet LTC3723 (Analog Devices)
| Hersteller | Analog Devices |
| Beschreibung | Synchronous Push-Pull PWM Controllers |
| Seiten / Seite | 20 / 1 — FEATURES. DESCRIPTIO. High Efficiency Synchronous Push-Pull PWM. 1.5A … |
| Dateiformat / Größe | PDF / 347 Kb |
| Dokumentensprache | Englisch |
FEATURES. DESCRIPTIO. High Efficiency Synchronous Push-Pull PWM. 1.5A Sink, 1A Source Output Drivers
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LTC3723-1/LTC3723-2 Synchronous Push-Pull PWM Controllers
U FEATURES DESCRIPTIO
■
High Efficiency Synchronous Push-Pull PWM
The LTC®3723-1/LTC3723-2 synchronous push-pull PWM ■
1.5A Sink, 1A Source Output Drivers
controllers provide all of the control and protection func- ■
Supports Push-Pull, Full-Bridge, Half-Bridge, and
tions necessary for compact and highly efficient, isolated
Forward Topologies
power converters. High integration minimizes external ■
Adjustable Push-Pull Dead-Time and Synchronous
component count, while preserving design flexibility.
Timing
The robust push-pull output stages switch at half the ■
Adjustable System Undervoltage Lockout and
oscillator frequency. Dead-time is independently pro-
Hysteresis
grammed with an external resistor. Synchronous rectifier ■ Adjustable Leading Edge Blanking timing is adjustable to optimize efficiency. A UVLO pro- ■ Low Start-Up and Quiescent Currents gram input provides precise system turn-on and turn off ■ Current Mode (LTC3723-1) or Voltage Mode voltages. The LTC3723-1 features peak current mode (LTC3723-2) Operation control with programmable slope compensation and lead- ■ Single Resistor Slope Compensation ing edge blanking, while the LTC3723-2 employs voltage ■ VCC UVLO and 25mA Shunt Regulator mode control with voltage feedforward capability. ■ Programmable Fixed Frequency Operation to 1MHz ■ 50mA Synchronous Output Drivers The LTC3723-1/LTC3723-2 feature extremely low operat- ■ Soft-Start, Cycle-by-Cycle Current Limiting and ing and start-up currents. Both devices provide reliable Hiccup Mode Short-Circuit Protection short-circuit and overtemperature protection. The ■ 5V, 15mA Low Dropout Regulator LTC3723-1/LTC3723-2 are offered in a 16-pin SSOP ■ Available in 16-Pin SSOP Package package.
U
, LTC and LT are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners.
APPLICATIO S
■ Telecommunications, Infrastructure Power Systems ■ Distributed Power Architectures
U TYPICAL APPLICATIO Isolated Push-Pull Converter
VOUT VIN ME UVLO DRVA FROM SYNC • • AUXILIARY SPRG DRVB LTC3901 WINDING V CS CC MF VREF DPRG C SDRA T V V REF OUT R SDRB LEB VREF V+ LTC3723-1 COLL RREF VOUT LT1431 SS COMP GND-F GND-S FB GND 372312 TA01 372312f 1
U FEATURES DESCRIPTIO
■
High Efficiency Synchronous Push-Pull PWM
The LTC®3723-1/LTC3723-2 synchronous push-pull PWM ■
1.5A Sink, 1A Source Output Drivers
controllers provide all of the control and protection func- ■
Supports Push-Pull, Full-Bridge, Half-Bridge, and
tions necessary for compact and highly efficient, isolated
Forward Topologies
power converters. High integration minimizes external ■
Adjustable Push-Pull Dead-Time and Synchronous
component count, while preserving design flexibility.
Timing
The robust push-pull output stages switch at half the ■
Adjustable System Undervoltage Lockout and
oscillator frequency. Dead-time is independently pro-
Hysteresis
grammed with an external resistor. Synchronous rectifier ■ Adjustable Leading Edge Blanking timing is adjustable to optimize efficiency. A UVLO pro- ■ Low Start-Up and Quiescent Currents gram input provides precise system turn-on and turn off ■ Current Mode (LTC3723-1) or Voltage Mode voltages. The LTC3723-1 features peak current mode (LTC3723-2) Operation control with programmable slope compensation and lead- ■ Single Resistor Slope Compensation ing edge blanking, while the LTC3723-2 employs voltage ■ VCC UVLO and 25mA Shunt Regulator mode control with voltage feedforward capability. ■ Programmable Fixed Frequency Operation to 1MHz ■ 50mA Synchronous Output Drivers The LTC3723-1/LTC3723-2 feature extremely low operat- ■ Soft-Start, Cycle-by-Cycle Current Limiting and ing and start-up currents. Both devices provide reliable Hiccup Mode Short-Circuit Protection short-circuit and overtemperature protection. The ■ 5V, 15mA Low Dropout Regulator LTC3723-1/LTC3723-2 are offered in a 16-pin SSOP ■ Available in 16-Pin SSOP Package package.
U
, LTC and LT are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners.
APPLICATIO S
■ Telecommunications, Infrastructure Power Systems ■ Distributed Power Architectures
U TYPICAL APPLICATIO Isolated Push-Pull Converter
VOUT VIN ME UVLO DRVA FROM SYNC • • AUXILIARY SPRG DRVB LTC3901 WINDING V CS CC MF VREF DPRG C SDRA T V V REF OUT R SDRB LEB VREF V+ LTC3723-1 COLL RREF VOUT LT1431 SS COMP GND-F GND-S FB GND 372312 TA01 372312f 1