MAX16820ATT+T Maxim Integrated Products, MAX16820ATT+T Datasheet

IC LED DRIVER HIGH BRIGHT 6-TDFN

MAX16820ATT+T

Manufacturer Part Number
MAX16820ATT+T
Description
IC LED DRIVER HIGH BRIGHT 6-TDFN
Manufacturer
Maxim Integrated Products
Type
HBLED Driverr
Datasheet

Specifications of MAX16820ATT+T

Constant Current
Yes
Topology
PWM, Step-Down (Buck)
Number Of Outputs
1
Internal Driver
No
Type - Primary
Automotive
Type - Secondary
*
Frequency
2MHz
Voltage - Supply
4.5 V ~ 28 V
Voltage - Output
4 V ~ 5.5 V
Mounting Type
Surface Mount
Package / Case
6-TDFN Exposed Pad
Operating Temperature
-40°C ~ 125°C
Current - Output / Channel
1A
Internal Switch(s)
No
Low Level Output Current
1000000 uA (Typ)
High Level Output Current
50000 uA (Typ)
Operating Supply Voltage
4.5 V to 28 V
Maximum Supply Current
425 uA
Maximum Power Dissipation
1454 mW
Maximum Operating Temperature
+ 125 C
Mounting Style
SMD/SMT
Minimum Operating Temperature
- 40 C
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Efficiency
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Other names
MAX16820ATT+T
MAX16820ATT+TTR
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 applica-
tions requiring a wide input voltage range. The high-side
current-sensing and an integrated current-setting circuit-
ry minimize the number of external components while
delivering an LED current with ±5% accuracy. A hys-
teretic 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 fre-
quency, thus allowing for small component size.
The MAX16819/MAX16820 operate over the -40°C to
+125°C automotive temperature range and are avail-
able in 3mm x 3mm x 0.8mm, 6-pin TDFN packages.
19-0706; Rev 1; 3/07
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
High-Side Current Sense and 5000:1 Dimming
Architectural, Industrial, and Ambient Lighting
Automotive RCL, DRL, and Fog Lights
MR16 and Other LED Bulbs
Indicators and Emergency Lighting
TOP VIEW
________________________________________________________________ Maxim Integrated Products
2MHz High-Brightness LED Drivers with
+
General Description
6
1
MAX16819
MAX16820
Pin Configuration
TDFN
5
2
Applications
4
3
o High-Side Current Sense
o Dedicated Dimming Control Input
o 20kHz Maximum Dimming Frequency
o Hysteretic Control: No Compensation
o Up to 2MHz Switching Frequency
o ±5% LED Current Accuracy
o Adjustable Constant LED Current
o 4.5V to 28V Input Voltage Range
o Over 25W Output Power
o 5V, 10mA On-Board Regulator
o -40°C to +125°C Operating Temperature Range
Note: All devices are specified over the -40°C to +125°C oper-
ating temperature range.
+ Denotes lead-free package.
* EP = Exposed paddle.
MAX16819ATT+T
MAX16820ATT+T
V
IN
C
IN
PART
Typical Operating Circuit
R
SENSE
IN
CSN
DIM
6 TDFN–EP*
6 TDFN-EP*
PIN-PACKAGE
Ordering Information
MAX16819
MAX16820
GND
DRV
V
CC
PKG CODE
T633-2
T633-2
C
VCC
Features
L
MARK
+ATB
+ATC
TOP
1

Related parts for MAX16820ATT+T

MAX16820ATT+T Summary of contents

Page 1

... Input Voltage Range o Over 25W Output Power o 5V, 10mA On-Board Regulator o -40°C to +125°C Operating Temperature Range PART MAX16819ATT+T MAX16820ATT+T Note: All devices are specified over the -40°C to +125°C oper- ating temperature range. Applications + Denotes lead-free package Exposed paddle. ...

Page 2

High-Brightness LED Drivers with High-Side Current Sense and 5000:1 Dimming ABSOLUTE MAXIMUM RATINGS IN, CSN, DIM to GND .............................................-0.3V to +30V V , DRV to GND ....................................................-0.3V to +6V CC CSN to IN...............................................................-0.3V to +0.3V Maximum Current into Any ...

Page 3

High-Brightness LED Drivers with High-Side Current Sense and 5000:1 Dimming ELECTRICAL CHARACTERISTICS (continued 12V 1µ DIM IN VCC T = +25°C.) (Note 1) A PARAMETER SYMBOL GATE DRIVER Gate ...

Page 4

High-Brightness LED Drivers with High-Side Current Sense and 5000:1 Dimming ( 12V 1µ DIM VCC SENSE noted.) EFFICIENCY vs 100 L = 47µH 95 LED ...

Page 5

High-Brightness LED Drivers with High-Side Current Sense and 5000:1 Dimming ( 12V 1µ DIM VCC SENSE noted.) PWM DIMMING AT 200Hz (1% DUTY CYCLE) MAX16819 toc09 V = 12V 47µH, ...

Page 6

High-Brightness LED Drivers with High-Side Current Sense and 5000:1 Dimming PIN NAME 1 IN Positive Supply Voltage Input. Bypass with a 1µF or higher value capacitor to GND. 2 CSN Current-Sense Input Logic-Level Dimming Input. Drive DIM low to ...

Page 7

High-Brightness LED Drivers with High-Side Current Sense and 5000:1 Dimming Undervoltage Lockout (UVLO) The MAX16819/MAX16820 include a 4.5V undervoltage lockout (UVLO) with 500mV hysteresis. When V below 4.5V, DRV goes low, turning off the external n-chan- nel MOSFET. DRV ...

Page 8

High-Brightness LED Drivers with High-Side Current Sense and 5000:1 Dimming MOSFET Selection The MAX16819/MAX16820’s gate driver is capable of sourcing 0.5A and sinking 1A of current. MOSFET selec- tion is based on the maximum input operating voltage V , ...

Page 9

High-Brightness LED Drivers with High-Side Current Sense and 5000:1 Dimming (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information go to www.maxim-ic.com/packages.) _______________________________________________________________________________________ Package Information 9 ...

Page 10

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 10 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2007 Maxim Integrated Products ...

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