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MAX16819, MAX16820
2MHz High-Brightness LED Drivers with High-Side Current Sense and 5000:1 Dimming
High-Brightness Step-Down LED Driver Controllers with High-Side Current-Sensing and Rapid Current-Pulsing Capability
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Status
Active: In Production.
Description
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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Data Sheet
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An evaluation kit is available: MAX16820EVKIT
Key Features
- High-Side Current Sense
- Dedicated Dimming Control Input
- 20kHz Maximum Dimming Frequency
- Hysteretic Control: No Compensation
- Up to 2MHz Switching Frequency
- ±5% LED Current Accuracy
- Adjustable Constant LED Current
- 4.5V to 28V Input Voltage Range
- Over 25W Output Power
- 5V, 10mA On-Board Regulator
- -40°C to +125°C Operating Temperature Range
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Applications/Uses
- Architectural, Industrial, and Ambient Lighting
- Automotive RCL, DRL, and Fog Lights
- Heads-Up Display
- Indicators and Emergency Lighting
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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 |
| MAX16819 |
Buck |
28 |
4.5 |
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3 |
26 |
No |
2000 |
20 |
200 |
No |
$0.87 @1k |
| MAX16820 |
Yes |
$0.87 @1k |
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See All High Brightness LED Drivers (25)
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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.
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Diagram
Simplified Diagram
More Information
Didn't Find What You Need?
Information Index
Document Ref.: 19-0706
Rev 1;
2007-03-20
This page last modified: 2007-11-19
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