SLUS593B 鈭?DECEMBER 2003 鈭?REVISED APRIL 2004
TPS40054
TPS40055
TPS40057
ELECTRICAL CHARACTERISTICS
TA = 鈭?0擄C to 85擄C, VIN = 24 Vdc, RT = 90.9 k鈩? IKFF = 150
碌A(chǔ),
fSW = 500 kHz, all parameters at zero power dissipation
(unless otherwise noted)
PARAMETER
CURRENT LIMIT
ISINK
Current limit sink current
Propagation delay to output
tON
tOFF
VOS
Switch leading-edge blanking pulse time(1)
Off time during a fault
TA = 25擄C
VILIM = 23.6 V,
VILIM = 23.6 V,
OUTPUT DRIVER
tLRISE
tLFALL
tHRISE
tHFALL
VOH
VOL
VOH
VOL
Low-side driver rise time
Low-side driver fall time
High-side driver rise time
High-side driver fall time
High-level ouput voltage, HDRV
Low-level ouput voltage, HDRV
High-level ouput voltage, LDRV
Low-level ouput voltage, LDRV
Minimum controllable pulse width
SS/SD SHUTDOWN
VSD
VEN
Shutdown threshold voltage
Device active threshold voltage
Outputs off
90
190
31.2
鈭?0
125
210
32.2
鈭?
160
245
33.5
0
25
165
20
RKFF = 28.7 k鈩?/div>
6.95
7.2
7.50
7.5
0.46
7.95
7.9
V
mV
CLOAD = 2200 pF, (HDRV 鈭?SW)
IHDRV = 鈭?.1 A (HDRV 鈭?SW)
IHDRV = 0.1 A (HDRV 鈭?SW)
ILDRV = 鈭?.1 A
ILDRV = 0.1 A
100
BP10
鈭?.4 V
BP10
鈭?1.0 V
0.5
150
ns
BOOST
鈭?.5 V
CLOAD = 2200 pF
48
24
48
36
BOOST
鈭?.0 V
0.75
V
96
48
96
72
ns
鈭?0
0擄C
鈮?/div>
TA
鈮?/div>
85擄C
鈭?0擄C
鈮?/div>
TA
鈮?/div>
85擄C
鈭?20
鈭?20
VILIM = 23.7 V, VSW = (VILIM 鈭?0.5 V)
VILIM = 23.7 V, VSW = (VILIM 鈭?2 V)
100
7
鈭?0
鈭?0
鈭?8
鈭?0
mV
cycles
8.5
10.0
300
200
ns
11.5
碌A(chǔ)
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Offset voltage SW vs. ILIM
BOOST REGULATOR
VBOOST Output voltage
VIN = 24.0 V
RECTIFIER ZERO CURRENT COMPARATOR (TPS40054 ONLY)
VSW
Switch voltage
SW NODE
ILEAK
Leakage current(1)
THERMAL SHUTDOWN
TSD
UVLO
VUVLO
VDD
VDD
(1)
(2)
KFF programmable threshold voltage
UVLO, fixed
UVLO, hysteresis
Ensured by design. Not production tested.
IKFF increases with SYNC frequency, IKFF decreases with maximum duty cycle
Shutdown temperature(1)
Hysteresis(1)
LDRV output OFF
V
mV
碌A(chǔ)
擄C
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