The MAX16819/MAX16820, step-down constant-current
high-brightness LED (HB LED) drivers provide a cost-effective
solution for automotive interior/exterior lighting,
architectural and ambient lighting, LED bulbs such as
MR16 and other LED illumination applications.
The MAX16819/MAX16820 operate from a 4.5V to 28V
input voltage range and feature a 5V/10mA on-board
regulator. A high-side current-sense resistor adjusts the
output current and a dedicated PWM input (DIM)
enables a wide range of pulsed dimming.
The MAX16819/MAX16820 are well suited for applications
requiring a wide input voltage range. The high-side
current-sensing and an integrated current-setting circuitry
minimize the number of external components while
delivering an LED current with ±5% accuracy. A hysteretic
control algorithm ensures excellent input-supply
rejection and fast response during load transients and
PWM dimming. The MAX16819 features a 30% inductor
current ripple and the MAX16820 features a 10% current
ripple. These devices operate up to 2MHz switching frequency,
thus allowing for small component size.
The MAX16819/MAX16820 operate over the -40°C to
+125°C automotive temperature range and are available
in 3mm x 3mm x 0.8mm, 6-pin TDFN packages.
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