MP7200

42V, 1.2A/3A, Synchronous Buck-Boost LED Driver

Description

The MP7200 is a high-frequency, constant-current, synchronous buck-boost LED driver with integrated power MOSFETs. It offers a compact solution that can achieve up to 1.2A of continuous output current (I_OUT) across a wide input voltage (V_IN) range, with excellent load and line regulation. Buck mode can also provide up to 3A of constant load current.

Constant-frequency hysteretic control provides fast transient response without loop compensation. In buck mode, the IC has a fixed switching frequency (f_SW) of up to 2.3MHz to reduce the current ripple and electromagnetic interference (EMI). In buck-boost mode, f_SW can be as low as 1.15MHz to optimize efficiency and thermal performance.

Full protection features include over-current protection (OCP), output over-voltage protection (OVP), under-voltage protection (UVP), thermal derating, and thermal shutdown. The fault indicator outputs an active logic low signal that indicates whether a fault has occurred.

The MP7200 requires a minimal number of readily available, standard external components, and is available in a space-saving QFN-19 (3mmx4mm) package.

Features & Benefits

Wide 6V to 42V Operating Input Voltage (V_IN) Range
44mΩ/40mΩ Low R_DS(ON) Internal Power MOSFETs
Synchronous Mode for High Efficiency
Configurable 1.2A Buck-Boost Mode and 3A Buck Mode
Configurable LED Current without a Current-Sense Resistor
Up to 2.3MHz Default Switching Frequency (f_SW) for Buck Mode, and down to 1.15MHz f_SW for Buck-Boost Mode with Spread Spectrum
Pulse-Width Modulation (PWM) Dimming with 100Hz to 2kHz Dimming Frequency
500Hz Internal Two-Step Dimming with Configurable Duty Cycle
Fault Indication
Output Over-Voltage Protection (OVP)
Over-Current Protection (OCP) with Latch-Off Mode
Thermal Shutdown
Configurable Thermal Derating via Remote Temperature Sense (NTC Pin)
Electromagnetic Interference (EMI) Reduction Technique
Available in a QFN-19 (3mmx4mm) Package
Available in a Wettable Flank Package