Rainbow-electronics MAX16820 Manual do Utilizador descarregar pdf (Página 2)

MAX16819/MAX16820

2MHz High-Brightness LED Drivers with

High-Side Current Sense and 5000:1 Dimming

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

= 12V, V

DIM

= V

, C

VCC

= 1µF, R

SENSE

= 0.5Ω, T

= T

= -40°C to +125°C, unless otherwise noted. Typical values are at

= +25°C.) (Note 1)

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional

operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to

absolute maximum rating conditions for extended periods may affect device reliability.

IN, CSN, DIM to GND .............................................-0.3V to +30V

, DRV to GND ....................................................-0.3V to +6V

CSN to IN...............................................................-0.3V to +0.3V

Maximum Current into Any Pin

(except IN, V

, and DRV)............................................±20mA

Continuous Power Dissipation (T

= +70°C)

6-Pin TDFN (derate 18.17mW/

above +70°C).......1454mW

Operating Temperature Range .........................-40°C to +125°C

Junction Temperature......................................................+150°C

Storage Temperature Range .............................-65°C to +150°C

Lead Temperature (soldering, 10s) .................................+300°C

Pin-to-Pin ESD Ratings (HB Model).....................................2.5kV

*As per JEDEC51 Standard (Single-Layer Board).

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Input Voltage Range V

4.5 28.0 V

Maximum Current Regulator

Switching Frequency

2 MHz

Ground Current I

GND

DRV open 1.5 mA

Supply Current I

DIM

< 0.6V 425 µA

= V

CSN

= V

DIM

, V

rising from 4V until

DRV

> V

- 0.5V

4.7 5.0

Undervoltage Lockout UVLO

= V

CSN

= V

DIM

, V

falling from 6V,

DRV

< 0.5V

4.5

Undervoltage Lockout Hysteresis 0.5 V

SENSE COMPARATOR

- V

CSN

) rising from 0V until V

DRV

0.5V (MAX16820)

195 210 225

Sense Voltage Threshold High V

SNSHI

- V

CSN

) rising from 0V until V

DRV

0.5V (MAX16819)

213 230 246

- V

CSN

) falling from 0.26V until V

DRV

- 0.5V) (MAX16820)

176 190 204

Sense Voltage Threshold Low V

SNSLO

- V

CSN

) falling from 0.26V until V

DRV

- 0.5V) (MAX16819)

158 170 182

Propagation Delay to Output

High

DPDH

Falling edge of (V

- V

CSN

) from 0.26V to

0V to DRV high, C

DRV

= 1nF

82 ns

Propagation Delay to Output Low t

DPDL

Rising edge of (V

- V

CSN

) from 0V to

0.26V to DRV low, C

DRV

= 1nF

82 ns

Current-Sense Input Current I

CSN

- V

CSN

) = 200mV 1 µA

MAX16819 56 70 mV

Current-Sense Threshold

Hysteresis

HYS

MAX16820 17 35 mV

1 2 3 4 5 6 7 8 9 10

MAX16819/MAX16820 1

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