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MAX16832A, MAX16832C
2MHz, High-Brightness LED Drivers with Integrated MOSFET and High-Side Current Sense
High-Voltage, High-Efficiency LED Drivers with Integrated MOSFET Save Space and Cost
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Status
Active: In Production.
Description
The MAX16832A/MAX16832C step-down constant-current high-brightness LED (HB LED) drivers provide a cost-effective design solution for automotive interior/exterior lighting, architectural and ambient lighting, LED bulbs, and other LED illumination applications.
The MAX16832A/MAX16832C operate from a +6.5V to +65V input voltage range and can provide an output current up to 700mA, if operated up to a temperature of +125°C, or up to a 1A if operated up to a temperature of +105°C. A high-side current-sense resistor adjusts the output current, and a dedicated pulse-width modulation (PWM) input enables pulsed LED dimming over a wide range of brightness levels.
These devices 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 average output current with ±3% accuracy. A hysteretic control method ensures excellent input supply rejection and fast response during load transients and PWM dimming. The MAX16832A allows 10% current ripple, and the MAX16832C allows 30% current ripple. Both devices operate up to a 2MHz switching frequency, thus allowing the use of small-sized components.
The MAX16832A/MAX16832C offer an analog dimming feature that reduces the output current by applying an external DC voltage below the internal 2V threshold voltage from TEMP_I to GND. TEMP_I also sources 25µA to a negative temperature coefficient (NTC) thermistor connected between TEMP_I and GND, thus providing an analog thermal-foldback feature that reduces the LED current when the temperature of the LED string exceeds a specified temperature point. Additional features include thermal-shutdown protection.
The MAX16832A/MAX16832C operate over the -40°C to +125°C automotive temperature range and are available in a thermally enhanced 8-pin SO package.
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Data Sheet
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An evaluation kit is available: MAX16832CEVKIT
Key Features
- High-Efficiency Solution
- 6.5V to 65V Input Voltage Range
- Output Current Up to 1A
- On-Board 65V, 0.45Ω Power MOSFET
- Hysteretic Control: Up to 2MHz Switching Frequency
- ±3% LED Current Accuracy
- 200mV Current-Sense Reference
- Resistor-Programmable Constant LED Current
- Integrated High-Side Current Sense
- Thermal-Foldback Protection/Linear Dimming
- Thermal-Shutdown Protection
- Available in a Thermally Enhanced 8-Pin SO Package
- -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 Displays
- Indicator and Emergency Lighting
- MR16 and MR111 LED Lights
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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 |
| MAX16832 |
Buck |
65 |
6.5 |
|
0.7 |
63 |
Yes |
2000 |
20 |
200 |
Yes |
$1.95 @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
Typical Application Circuit
Application Notes
Product Guides
Reliability Reports
Software/Models
Ordering Information
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Part Number
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Free
Sample |
Buy |
Status
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Package:
TYPE PINS FOOTPRINT
DRAWING CODE/VAR *
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Temp |
RoHS/Lead-Free?
Materials Analysis
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| MAX16832AASA+
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Active |
SOIC(N)-EP;8 pin;30.9 mm²
Outline Drawing:21-0111 (PDF)
Land Pattern: 90-0150 (PDF)
Use pkgcode/variation: S8E+12*
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-40°C to +125°C
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RoHS/Lead-Free: Lead Free
Materials Analysis |
| MAX16832AASA+T
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Active |
SOIC(N)-EP;8 pin;30.9 mm²
Outline Drawing:21-0111 (PDF)
Land Pattern: 90-0150 (PDF)
Use pkgcode/variation: S8E+12*
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-40°C to +125°C
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RoHS/Lead-Free: Lead Free
Materials Analysis |
| MAX16832CASA+
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Active |
SOIC(N)-EP;8 pin;30.9 mm²
Outline Drawing:21-0111 (PDF)
Land Pattern: 90-0150 (PDF)
Use pkgcode/variation: S8E+12*
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-40°C to +125°C
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RoHS/Lead-Free: Lead Free
Materials Analysis |
| MAX16832CASA+T
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Active |
SOIC(N)-EP;8 pin;30.9 mm²
Outline Drawing:21-0111 (PDF)
Land Pattern: 90-0150 (PDF)
Use pkgcode/variation: S8E+12*
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-40°C to +125°C
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RoHS/Lead-Free: Lead Free
Materials Analysis |
Notes:
- Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales.
- Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day.
- Part number suffixes: T or T&R = tape and reel; + = RoHS/lead-free; # = RoHS/lead-exempt; -D = drypack; -U/+U on DS parts = cut tape. More: See Full Data Sheet or Maxim Product Naming Conventions.
- * Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.
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Information Index
Document Ref.: 19-4140
Rev 4;
2010-09-01
This page last modified: 2010-12-03
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