ISL78420_15 Datasheet, PDF (6/18 Pages) Intersil Corporation – 100V, 2A Peak, Half-Bridge Driver with Tri-Level PWM Input and Adjustable Dead-Time

ISL78420
Switching Specifications V_DD = V_HB = 12V, V_SS = V_HS = 0V, PWM = 0V to 12V, R_DT = 8kΩ or 80kΩ. No Load on LO or HO, unless
otherwise specified. Boldface limits apply across the operating temperature range, -40°C to +125°C.
PARAMETERS
SYMBOL
TEST
CONDITIONS
T_J = +25°C
MIN TYP MAX
T_J = -40°C to +125°C
MIN
MAX
(Note 10) (Note 10)
UNITS
HO Turn-Off Propagation Delay
PWM Falling to HO Falling
t_PHO
-
32 50
-
60
ns
LO Turn-Off Propagation Delay
PWM Rising to LO Falling
t_PLO
-
32 50
-
60
ns
Minimum Dead-time Delay (Note 11)
HO Falling to LO Rising
t_{DTHL_min} R_DT = 80kΩ,
15 34 50
10
PWM High to Low
60
ns
Minimum Dead-time Delay (Note 11)
LO Falling to HO Rising
t_{DTLH_min} R_DT = 80kΩ
15 27 50
10
PWM Low to High
60
ns
Maximum Dead-time Delay (Note 11)
HO Falling to LO Rising
t_{DTHL_max} R_DT = 8kΩ,
150 220 300
-
PWM High to Low
-
ns
Maximum Dead-time Delay (Note 11)
LO Falling to HO Rising
t_{DTLH_max} R_DT = 8kΩ,
150 220 300
-
PWM Low to High
-
ns
Dead-time Delay Matching (Note 11)
|t_DTHL-t_DTLH|
Either Output Rise/Fall Time
(10% to 90%/90% to 10%)
t_{MATCH_min} R_DT = 80kΩ
t_{MATCH_max} R_DT = 8kΩ
t_R,t_F
C_L = 1nF
-
7
17
-
-
10 50
-
-
10
-
-
-
ns
-
ns
-
ns
Bootstrap Diode Turn-on or Turn-off Time
t_BS
-
10
-
-
-
ns
NOTES:
10. Parameters with MIN and/or MAX limits are 100% tested at +25°C, unless otherwise specified. Temperature limits are established by
characterization and are not production tested.
11. Dead Time is defined as the time between LO falling and HO rising or between HO falling and LO rising. See Timing Diagram below for measurement
specification.
Timing Diagram
V_PWMH
PWM
V M ID L
tPLO
RISE AND FALL TRANSITIONS OF THE PWM INPUTS ARE
tPHO
EXAGGERATED TO CLEARLY ILLUSTRATE THE LOW , MID,
AND HIGH THRESHOLD LEVELS.
V M IDH
V_PWML
PWM
HO
HO
LO
LO
tDTLH
tDTHL
EN
EN
t_DTLH: Dead Time Delay from LO falling to HO rising. Measured from 50% of LO to 50% of HO.
t_DTHL: Dead Time Delay from HO falling to LO rising. Measured from 50% of HO to 50% of LO.
t_PLO: Propagation Delay from PWM rising to LO falling. Measured from V_MIDL to 50% of LO.
t_PHO: Propagation Delay from PWM falling to HO falling. Measured from V_MIDH to 50% of HO.
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6
FN8296.3
November 6, 2014