A light-emitting diode (LED) driver circuit includes a DC-to-AC inverter that provides a primary AC voltage to the primary winding of an output transformer via a resonant tank circuit. The transformer has at least one secondary winding. An AC output voltage from the secondary winding is rectified to generate a DC voltage, which is applied to a load having a plurality of LEDs. An overshoot control circuit electrically connected in parallel with the primary winding of the transformer prevents the DC voltage applied to the load from exceeding the forward bias of the LEDs during startup conditions until the resonant tank circuit is stabilized. The overshoot control circuit includes a first diode and a first capacitor and further includes a second diode and a second capacitor. The first and second capacitors absorb energy during alternate half cycles of the primary AC voltage until the resonant tank circuit is stabilized.