LM5122 - 具有多相功能的 LM5122、LM5122Q 宽输入同步升压控制器

LM5122是TI德州仪器公司的一款控制器（外部开关）产品，LM5122是具有多相功能的 LM5122、LM5122Q 宽输入同步升压控制器，本站介绍了LM5122的封装应用图解、特点和优点、功能等，并给出了与LM5122相关的TI元器件型号供参考。

LM5122 - 具有多相功能的 LM5122、LM5122Q 宽输入同步升压控制器 - 控制器（外部开关） - DC/DC开关稳压器 - 德州仪器

产品特性

AEC-Q100 Grade 1 (TA = –40°C to 125°C)
Maximum Input Voltage : 65 V
Min Input Voltage : 3 V (4.5 V for startup)
Output Voltage up to 100 V
Bypass (VOUT = VIN) Operation
1.2 V Reference with ±1.0% Accuracy
Free-Run and Synchronizable Switching to 1 MHz
Peak Current Mode Control
Robust 3 A Integrated Gate Drivers
Adaptive Dead-Time Control
Optional Diode Emulation Mode
Programmable Cycle-by-Cycle Current Limit
Hiccup Mode Overload Protection
Programmable Line UVLO
Programmable Soft-Start
Thermal Shutdown Protection
Low Shutdown Quiescent Current: 9 μA
Programmable Slope Compensation
Programmable Skip Cycle Mode Reduces Standby Power
Allows External VCC Supply
Inductor DCR Current Sensing Capability
Multiphase Capability
Thermally Enhanced 20-Pin HTSSOP

产品应用

12-V, 24-V, and 48-V Power Systems
Automotive Start-Stop
Audio Power Supply
High Current Boost Power Supply

产品说明

The LM5122 is a multiphase capable synchronous boost controller intended for high-efficiency synchronous boost regulator applications. The control method is based upon peak current mode control. Current mode control provides inherent line feed-forward, cycle-by-cycle current limiting and ease of loop compensation.

The switching frequency is programmable up to 1 MHz. Higher efficiency is achieved by two robust N-channel MOSFET gate drivers with adaptive dead-time control. A user-selectable diode emulation mode also enables discontinuous mode operation for improved efficiency at light load conditions.

An internal charge pump allows 100% duty cycle for high-side synchronous switch (Bypass operation). A 180º phase shifted clock output enables easy multi-phase interleaved configuration. Additional features include thermal shutdown, frequency synchronization, hiccup mode current limit and adjustable line undervoltage lockout.

产品器件信息

PART NUMBER	PACKAGE	BODY SIZE (NOM)
LM5122	HTSSOP (20)	6.50 mm × 4.40 mm
LM5122-Q1	HTSSOP (20)	6.50 mm × 4.40 mm

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