|
|
|
MAX16801, MAX16801A, MAX16801B, MAX16802, MAX16802A, MAX16802B
Offline and DC-DC PWM Controllers for High-Brightness LED Drivers
LED Driver Solution with Wide Range of Operation and High-Current Accuracy
|
Status
Active: In Production.
Description
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.
|
|
Data Sheet
|
An evaluation kit is available: MAX16802BEVKIT
Key Features
- 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
- Available in a Tiny 8-Pin µMAX Package
|
|
Applications/Uses
- Commercial and Industrial Lighting
- Decorative and Architectural Lighting
- Offline and DC-DC LED Drivers
- RGB Back Light for LCD TVs and Monitors
|
|
|
|
Key Specifications:
| High Brightness LED Drivers |
| Part Number |
Topology |
Device VIN
(V) |
Device VIN
(V) |
LED Channels |
ILED per Channel
(A) |
LED String Volt.
(V) |
Internal Pwr. MOSFETs |
Freq.
(kHz) |
PWM Dimming Freq.
(kHz) |
PWM Dimming Ratio |
EV Kit |
Budgetary Price |
| max |
min |
max |
max |
max |
max |
max |
See Notes |
| MAX16801 |
|
24 |
10.8 |
1 |
3 |
250 |
No |
262 |
2 |
3000 |
No |
$0.99 @1k |
| MAX16802 |
|
Yes |
$0.99 @1k |
|
See All High Brightness LED Drivers (29)
|
Pricing 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.
|
|
Diagram
 Typical Operating Circuit
More Information
Didn't Find What You Need?
Information Index
Document Ref.: 19-3880
Rev 2;
2010-04-01
This page last modified: 2010-04-01
|
|
|
Download
E-Mail