Rainbow-electronics MAX5069 Manual do Utilizador descarregar pdf (Página 2)

MAX5069

High-Frequency, Current-Mode PWM Controller

with Accurate Oscillator and Dual FET Drivers

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

= +12V for the MAX5069C/D, V

= +23.6V for the MAX5069A/B at startup, then reduces to +12V, C

= C

REG5

= 0.1µF,

VCC

= 1µF, R

= 100kΩ, NDRV_ = floating, T

= T

MIN

to T

MAX

, unless otherwise noted. Typical values are at T

= +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 to PGND ............................................................-0.3V to +30V

IN to AGND.............................................................-0.3V to +30V

to PGND..........................................................-0.3V to +13V

to AGND..........................................................-0.3V to +13V

FB, COMP, CS, HYST, SYNC, REG5 to AGND ........-0.3V to +6V

UVLO/EN, RT, DT, SCOMP, FLTINT to AGND .........-0.3V to +6V

NDRVA, NDRVB to PGND..........................-0.3V to (V

+ 0.3V)

AGND to PGND.....................................................-0.3V to +0.3V

Continuous Power Dissipation (T

= +70°C)

16-Pin TSSOP-EP (derate 21.3mW/°C above +70°C)...1702mW

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

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

Storage Temperature Range .............................-60°C to +150°C

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

PARAMETER

SYMBOL

CONDITIONS

MIN TYP MAX

UNITS

UNDERVOLTAGE LOCKOUT/STARTUP

Bootstrap UVLO Wake-Up Level

SUVR

rising, MAX5069A/B

19.68 21.6 23.60

Bootstrap UVLO Shutdown Level

SUVF

falling, MAX5069A/B

9.05 9.74 10.43

UVLO/EN Wake-Up Threshold V

ULR2

UVLO/EN rising

1.205 1.230 1.255

UVLO/EN Shutdown Threshold V

ULF2

UVLO/EN falling

1.18

HYST FET On-Resistance

D S

(

)

MAX5069B/C only, sinking 50mA,

UVLO/EN

= 0V

Ω

HYST FET Leakage Current I

LEAK_H

UVLO/EN

= 2V, V

HYST

= 5V 3 nA

IN Supply Current In

Undervoltage Lockout

START

= +19V, V

UVLO/EN

< V

ULF2

90 µA

IN Range V

10.8 24.0

INTERNAL SUPPLIES (V

and REG5)

Regulator Set Point V

CCSP

= + 10.8V to + 24V , V

C C

sour ci ng 1µA to 25m A 7.0 10.5

REG5 Output Voltage V

REG5

= 0 to 1mA

4.85 5.00 5.15

REG5 Short-Circuit Current Limit

REG5_SC

= 1.25MHz 7

IN Supply Current After Startup I

= +24V

= 100kHz 3

Shutdown Supply Current I

VIN_SD

90 µA

GATE DRIVER (NDRVA, NDRVB)

OUT

(

LOW

)

NDRVA/NDRVB sinking 100mA 2 4

Driver Output Impedance

OUT

(

HIGH

)

NDRVA/NDRVB sourcing 25mA 3 6

Ω

Sinking

1000

Driver Peak Output Current I

NDRV

Sourcing

650

PWM COMPARATOR

Comparator Offset Voltage

OS_PWM

COMP

> V

1.30 1.60 2.00

Comparator Propagation Delay

PD_PWM

= 0.1V

Minimum On-Time

(

MIN

)

Includes t

CS_BLANK

110

CURRENT-LIMIT COMPARATOR

Current-Limit Trip Threshold V

298 314 330

1 2 3 4 5 6 7 ... 18 19

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