UCC28951
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ZHCSIQ7A –AUGUST 2018 –REVISED DECEMBER 2021
6.6 Timing Requirements
MIN
NOM
MAX
UNIT
CYCLE-BY-CYCLE CURRENT LIMIT
Propagation delay from CS to OUTC and OUTD outputs
Input pulse between CS and GND from zero to 2.5 V
TCS
100
ns
PROGRAMMABLE DELAY TIME SET ACCURACY AND RANGE(1) (2) (3) (4) (5)
Short delay time set accuracy between OUTA and OUTB
CS = ADEL = ADELEF = 1.8 V
TABSET1
32
216
32
45
270
45
56
325
56
ns
ns
ns
ns
ns
ns
ns
ns
Long delay time set accuracy between OUTA and OUTB
CS = ADEL = ADELEF = 0.2 V
TABSET2
Short delay time set accuracy between OUTC and OUTD
CS = ADEL = ADELEF = 1.8 V
TCDSET1
Long delay time set accuracy between OUTC and OUTD
CS = ADEL = ADELEF = 0.2 V
TCDSET2
216
22
270
35
325
48
Short delay time set accuracy between falling OUTA, OUTF
CS = ADEL = ADELEF = 0.2 V
TAFSET1
Long delay time set accuracy between falling OUTA, OUTF
CS = ADEL = ADELEF = 1.8 V
TAFSET2
190
22
240
35
290
48
Short delay time set accuracy between falling OUTB, OUTE
CS = ADEL = ADELEF = 0.2 V
TBESET1
Long delay time set accuracy between falling OUTB, OUTE
CS = ADEL = ADELEF = 1.8 V
TBESET2
190
240
290
Pulse matching between OUTA rise, OUTD fall and OUTB
rise, OUTC fall
CS = ADEL = ADELEF = 1.8 V, COMP = 2 V
0
0
0
0
50
50
60
60
ns
ns
ns
ns
ΔTADBC
ΔTABBA
ΔTEEFF
ΔTEFFE
–50
–50
–60
–60
Half cycle matching between OUTA rise, OUTB rise and
OUTB rise, OUTA rise
CS = ADEL = ADELEF = 1.8 V, COMP = 2 V
Pulse matching between OUTE fall, OUTE rise and OUTF fall,
OUTF rise
CS = ADEL = ADELEF = 0.2 V, COMP = 2 V
Pulse matching between OUTE fall, OUTF rise and OUTF fall,
OUTE rise
CS = ADEL = ADELEF = 0.2 V, COMP = 2 V
LIGHT-LOAD EFFICIENCY CIRCUIT
TMIN
OUTPUTS OUTA, OUTB, OUTC, OUTD, OUTE, OUTF
425
525
625
ns
Total range, RTMIN = 88.7 kΩ
TR
TF
Rise time, CLOAD = 100 pF
Fall time, CLOAD = 100 pF
9
7
25
25
ns
ns
6.7 Dissipation Ratings
over operating free-air temperature range (unless otherwise noted)
DERATING FACTOR
PACKAGE
POWER RATING
TA = 70°C
ABOVE TA = 25°C
TA < 25°C
TA = 85°C
PW
10.7 mW/°C
1.07 W
0.59 W
0.429 W
Copyright © 2023 Texas Instruments Incorporated
English Data Sheet: SLUSDB2
10
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