TI LM5156QDSSRQ1

LM5156x-Q1（LM5156-Q1 和 LM51561-Q1）是一款采用峰值电流模式控制、具有宽输入范围的非同步升压控制器，可用于升压、SEPIC 和反激式拓扑。

若 BIAS 引脚与 VCC 引脚相连，LM5156x-Q1 可由单节电池（最低电压 2.97V）供电。若 BIAS 引脚电压高于 3.5V，则输入电源电压最低可降至 1.5V。

The internal VCC regulator also supports BIAS pin operation up to 60 V (65-V absolute maximum) for automotive load dump. The switching frequency is dynamically programmable with an external resistor from 100 kHz to 2.2 MHz. Switching at 2.2 MHz minimizes AM band interference and allows for a small solution size and fast transient response. To reduce the EMI of the power supply, the device provides a selectable dual random spread spectrum which reduces the EMI over the wide frequency range.

The device features a 1.5-A standard MOSFET driver and a low 100-mV current limit threshold. The device also supports the use of an external VCC supply to improve efficiency. Low operating current and pulse-skipping operation improve efficiency at light loads.

The device has built-in protection features such as cycle-by-cycle current limit, overvoltage protection, line UVLO, and thermal shutdown. Hiccup mode overload protection is available in the LM51561-Q1 device option. Additional features include low shutdown I_Q, programmable soft start, programmable slope compensation, precision reference, power-good indicator, and external clock synchronization.

• AEC-Q100 qualified for automotive applications – Temperature Grade 1: -40°C to +125°C TA
• Functional Safety capable
• Documentation available to aid functional safety system design for automotive battery applications with wide input operating range – 3.5V to 60V operating voltage range (absolute maximum 65V)
• 2.97V to 16V BIAS voltage when BIAS = VCC
• Minimum boost supply voltage of 1.5V at ≥3.5V
• Input transient protection up to 65V
• Minimum battery consumption
• Low shutdown current (I_Q ≤ 2.6μA)
• Low operating current (I_Q ≤ 490μA)
• Small solution size, low cost
• Maximum switching frequency of 2.2MHz
• 12-pin WSON package (3mm × 2mm) with wettable flanks
• Integrated error amplifier supports primary-side regulation without optocoupler (flyback)
• Minimized undershoot during startup (start-stop applications)
• EMI mitigation
• Optional dual random spread spectrum
• Leadless package
• Low power consumption, high efficiency
• 100mV ±7% accurate current limit threshold
• Robust 1.5A peak standard MOSFET driver
• External VCC supply supported
• Avoids AM band interference and crosstalk
• Optional clock synchronization
• Dynamically programmable switching frequency from 100kHz to 2.2MHz
• Integrated protection features
• Constant peak current limit across input voltage range
• Optional discontinuous mode overload protection
• Programmable line UVLO
• OVP protection
• Thermal shutdown protection
• Precise ±1% accuracy feedback reference
• Programmable additional slope compensation
• Adjustable soft-start
• PGOOD indicator

• Automotive 12V or 24V battery applications
• Automotive start-stop applications
• High-voltage LiDAR power supply
• Multi-output flyback applications without optocoupler
• Automotive tail light LED bias power supply
• Wide-input boost, SEPIC, and flyback power modules
• Battery-powered boost, SEPIC, and flyback applications