The LM3524D family is an improved version of the industry standard LM3524. It has improved specifications and additional features yet is pin for pin compatible with existing 3524 families. New features reduce the need for additional external circuitry often required in the original version.

The LM3524D has a ±1% precision 5V reference. The current carrying capability of the output drive transistors has been raised to 200 mA while reducing V_CEsat and increasing V_CE breakdown to 60V. The common mode voltage range of the error-amp has been raised to 5.5V to eliminate the need for a resistive divider from the 5V reference.

In the LM3524D the circuit bias line has been isolated from the shut-down pin. This prevents the oscillator pulse amplitude and frequency from being disturbed by shut-down. Also at high frequencies (?300 kHz) the max. duty cycle per output has been improved to 44% compared to 35% max. duty cycle in other 3524s.

In addition, the LM3524D can now be synchronized externally, through pin 3. Also a latch has been added to insure one pulse per period even in noisy environments. The LM3524D includes double pulse suppression logic that insures when a shut-down condition is removed the state of the T-flip-flop will change only after the first clock pulse has arrived. This feature prevents the same output from being pulsed twice in a row, thus reducing the possibility of core saturation in push-pull designs.

• Fully Interchangeable With Standard LM3524 Family
• ±1% Precision 5V Reference With Thermal Shut-Down
• Output Current to 200 mA DC
• 60V Output Capability
• Wide Common Mode Input Range for Error-Amp
• One Pulse per Period (Noise Suppression)
• Improved Max. Duty Cycle at High Frequencies
• Double Pulse Suppression
• Synchronize Through Pin 3

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• Topology
• Full-Bridge,
• Duty cycle (Max) (%)
• 90
• Supply voltage (Max) (V)
• 40
• UVLO thresholds on/off (V)
• —
• Features
• Adjustable Switching Frequency, Error Amplifier, Multi-topology, Synchronization Pin
• Operating temperature range (C)
• 0 to 125
• Rating
• Catalog
• Frequency (Max) (kHz)
• 350
• Gate drive (Typ) (A)
• 0.2

LM3524D的完整型号有：LM3524DM/NOPB、LM3524DMX/NOPB，以下是这些产品的关键参数及官网采购报价：

LM3524DM/NOPB，工作温度：0 to 125，封装：SOIC (D)-16，包装数量MPQ：48个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：SN，TI官网LM3524DM/NOPB的批量USD价格：.587（1000+）

LM3524DMX/NOPB，工作温度：0 to 125，封装：SOIC (D)-16，包装数量MPQ：2500个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：SN，TI官网LM3524DMX/NOPB的批量USD价格：.489（1000+）

FLYBUCK-FLYBACK-DESIGN-CALC — Fly-Buck 和反激式拓扑选择器

该工具可帮助电源工程师基于规格选择正确的隔离式直流-直流拓扑。根据所选择的拓扑，计算器还会针对设计建议正确的 IC。