MAX14872 datasheet(4/15 Pages) MAXIM

4 / 15 page

(VDD = 4.5V to 36V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VDD = 12V, TA = +25°C) (Note 2)

Note 2: All units are production tested at TA = +25°C. Specifications over temperature are guaranteed by design.

Note 3: VSNS_TH is the threshold voltage to turn on current regulation.

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

PWM Frequency

fSW

EN = Low

MAX14870,

switching signal

applied at PWM

kHz

MAX14872,

switching signal

applied at FWD

or REV

Dead Time

tDEAD

140

M1, M2 Slew Rate

200

V/μs

M1, M2 High-Side Propagation

Delay

tPR

RL = 1kΩ, CL = 50pF,

PWM/FWD/DIR/REV rising, Figure 1

620

M1, M2 Low-Side Propagation

Delay

tPF

RL = 1kΩ, CL = 50pF,

PWM/FWD/DIR/REV falling, Figure 1

583

Current Regulation Fixed

Off-Time

tOFF

PWM/FWD = High, EN = Low,

VSNS > VSNS_TH

7.8

μs

Current Regulation Minimum

On-Time

tCR_BL

PWM/FWD = High, EN = Low,

VSNS > VSNS_TH

2.5

μs

Overcurrent Blanking Time

tOC_BL

M1/M2 is shorted to VDD or GND,

Figure 2

μs

Overcurrent Autoretry Timeout

tOC_TO

PWM/FWD = High, EN = Low,

IM or IM2 > IM_OL, Figure 2

Enable Turn-on Delay

tEN_ON

PWM/FWD = High, RL = 1kΩ,

CL = 50pF, EN falling,

M1/M2 rising to 10%, Figure 3

μs

Enable Turn-off Delay

tEN_OFF

PWM/FWD = High, RL = 1kΩ,

CL = 50pF, EN rising,

M1/M2 falling to 90%, Figure 3

μs

MAX14870/MAX14872

Compact 4.5V to 36V

Full-Bridge DC Motor Drivers

www.maximintegrated.com

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AC Electrical Characteristics

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