MAX17596 datasheet(5/23 Pages) MAXIM

Part #	MAX17596

Description	Peak-Current-Mode Controllers for Flyback and Boost Regulators

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Manufacturer	MAXIM [Maxim Integrated Products]

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MAX17595/MAX17596/MAX17597

Peak-Current-Mode Controllers for

Flyback and Boost Regulators

5

Maxim Integrated

ELECTRICAL CHARACTERISTICS (continued)

(VIN = 12V (for the MAX17595, bring VIN up to 21V for startup), VCS = VSLOPE = VDITHER = VFB = VOVI = VSGND = VPGND = 0V,

VEN/UVLO = +2V; NDRV, SS, COMP are unconnected, RRT = 25kI, CVIN = 1FF, CVDRV = 1FF, TA = TJ = -40NC to +125NC, unless

otherwise noted. Typical values are at TA = TJ = +25NC.) (Note 2)

Note 2: All devices 100% production tested at TA = +25°C. Limits over temperature are guaranteed by design.

Note 3: The MAX17595 is intended for use in universal input power supplies. The internal clamp circuit at VIN is used to prevent

the bootstrap capacitor from charging to a voltage beyond the absolute maximum rating of the device when EN is low

(shutdown mode). Externally limit the maximum current to VIN (hence to clamp) to 2mA (max) when EN is low.

Note 4: Using an external clock for synchronization increases the maximum duty cycle by a factor equal to fSYNC / fSW for the

MAX17595/MAX17596. External synchronization is not available for the MAX17597.

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

Slope Voltage Range

for Default Slope

Compensation

4

V

Slope Voltage Range

for Programmable Slope

Compensation

0.2

2

V

Slope Compensation Ramp

RSLOPE = 100k

W

140

165

190

mV/Fs

Default Slope

Compensation Ramp

4V < VSLOPE

50

mV/Fs

PWM COMPARATOR

Comparator Offset Voltage

VPWM-OS

VCOMP, when VCS = 0

1.65

1.81

2

V

Current-Sense Gain

ACS-PWM

D

VCOMP/DVCS

1.75

1.97

2.15

V/V

Comparator Propagation

Delay

tPWM

Change in VCS = 10mV (including internal lead-

edge blanking)

110

ns

ERROR AMPLIFIER

FB Reference Voltage

VREF

VFB, when ICOMP = 0 and VCOMP = 1.8V

1.19

1.21

1.23

V

FB Input Bias Current

IFB

VFB = 1.5V, TA = +25NC

-100

+100

nA

Voltage Gain

AEAMP

90

dB

Transconductance

Gm

1.5

1.8

2.1

mS

Transconductance

Bandwidth

BW

Open-loop (gain = 1), -3dB frequency

10

MHz

Source Current

VCOMP = 1.8V, VFB = 1V

80

120

210

F

A

Sink Current

VCOMP = 1.8V, VFB = 1.75V

80

120

210

F

A

THERMAL SHUTDOWN

Thermal-Shutdown

Threshold

Temperature rising

+160

N

C

Thermal-Shutdown

Hysteresis

20

N

C

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