The MAX16801A/B/MAX16802A/B high-brightness (HB)
LED driver-control ICs contain all the circuitry required
for the design of wide-input-voltage-range LED drivers
for general lighting and display applications. The
MAX16801 is well suited for universal input (rectified
85VAC to 265VAC) LED drivers, while the MAX16802 is
intended for low-input-voltage (10.8VDC to 24VDC) LED
drivers.
When the LED current needs to be tightly regulated, an
additional on-board error amplifier with 1% accurate reference
can be utilized. A wide dimming range can be
implemented by using low-frequency PWM dimming.
The MAX16801/MAX16802 feature an input undervoltage
lockout (UVLO) for programming the input-supply start
voltage, and to ensure proper operation during brownout
conditions. The MAX16801 has an internal-bootstrap
undervoltage lockout circuit with a large hysteresis that
simplifies offline LED driver designs. The MAX16802 does
not have this internal bootstrap circuit and can be biased
directly from a +12V rail.
The 262kHz fixed switching frequency is internally
trimmed, allowing for optimization of the magnetic and filter
components, resulting in a compact, cost-effective
LED driver. The MAX16801A/MAX16802A are offered with
50% maximum duty cycle.The MAX16801B/MAX16802B
are offered with 75% maximum duty cycle. These devices
are available in an 8-pin µMAX® package and operate
over the -40°C to +85°C temperature range.
Key Features
Applications/Uses
Suitable for Buck, Boost, Flyback, SEPIC, and Other Topologies
Up to 50W or Higher Output Power
Universal Offline Input Voltage Range: Rectified 85VAC to 265VAC (MAX16801)
IN Pin Directly Driven From 10.8VDC to 24VDC Input (MAX16802)
Internal Error Amplifier with 1% Accurate Reference for Precise LED Current Regulation
PWM or Linear Dimming
Fixed Switching Frequency of 262kHz ±12%
Thermal Shutdown
Digital Soft-Start
Programmable Input Startup Voltage
Internal Bootstrap UVLO with Large Hysteresis (MAX16801)
45µA (typ) Startup Supply Current, 1.4mA (typ) Operating Supply Current
50% (MAX16801A/MAX16802A) or 75% (MAX16801B/MAX16802B) Maximum Duty Cycle
Notes: **This pricing is BUDGETARY, for comparing similar parts. Prices are in
U.S. dollars and subject to change. Quantity pricing may vary
substantially and international prices may differ due to local
duties, taxes, fees, and exchange rates. For volume-specific prices
and delivery, please see the price and availability page
or contact an authorized distributor.
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