Today’s miniLED displays can be divided into multiple arrays. Each miniLED array with 900 pixels can have 60 channels where each channel has 15 LEDs connected in series. To drive multi-channel miniLEDs in parallel from a low input voltage $\mathrm{V}_{\mathrm{I}\mathrm{N}}$(=6V), a boost converter with high output voltage (up to 30V) and high output current (up to 1. 2A for 2000 nits) is required where the conversion ratio (CR $=\mathrm{V}_{\mathrm{OUT}}/\mathrm{V}_{\mathrm{I}\mathrm{N}}$) is 5. Since the inductor current $I_{L}=I_{LOAD}/(1-D)$ of the conventional 2-switch (2S) boost converter is high, where $\mathrm{I}_{\mathrm{LO}\mathrm{A}\mathrm{D}}$ is the load current and D is the duty cycle, 2S boost converters have low efficiency and high output voltage ripple. Although the boost converter assisted by a series flying capacitor $\mathrm{C}_{\mathrm{F}}$ can reduce the inductor current level to improve efficiency [1] –[5], $\mathrm{C}_{\mathrm{F}}$ lacks energy under high CR and high loading conditions. At the top of Fig. 17.9.1, both techniques in [1] and [2] charge the $\mathrm{C}_{\mathrm{F}}$ during $\varphi$ 2. ln case of high CR, the duration of $\varphi$ 2 becomes small to seriously affect the charging time. Hence, due to insufficient charge stored in $\mathrm{C}_{\mathrm{F}}$, the driving capability will decrease. At no load (left of Fig. 17.9.2), [1] fails to regulate and D is 0.87 in [2] to haveCR=5. lnterestingly, both$$ [1] and [2] fail to have CR=5 at load current =1.2A. Although additional dual channel-interleaved three-level buck-boost (DTLBB) structure in [1] can alternatively charge two flying capacitors, the hardware overhead is double and the quiescent current becomes high.