Datasheet

TPS40054
TPS40055
TPS40057
SLUS593H –DECEMBER 2003–REVISED JULY 2012 www.ti.com
ELECTRICAL CHARACTERISTICS (continued)
T
A
= –40°C to 85°C, V
IN
= 24 V
dc
, R
T
= 90.9 kΩ, I
KFF
= 150 µA, f
SW
= 500 kHz, all parameters at zero power dissipation
(unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
CURRENT LIMIT
I
SINK
Current limit sink current 8.5 10.0 11.5 µA
V
ILIM
= 23.7 V, V
SW
= (V
ILIM
– 0.5 V) 300
Propagation delay to output
V
ILIM
= 23.7 V, V
SW
= (V
ILIM
– 2 V) 200 ns
t
ON
Switch leading-edge blanking pulse time
(3)
100
t
OFF
Off time during a fault (soft-start cycle time) 7 cycles
T
A
= 25°C –90 –70 –50
V
OS
Offset voltage SW vs. ILIM V
ILIM
= 23.6 V, 0°C ≤ T
A
≤ 85°C –120 –38 mV
V
ILIM
= 23.6 V, -40°C ≤ T
A
≤ 85°C –120 –20
OUTPUT DRIVER
t
LRISE
Low-side driver rise time 48 96
C
LOAD
= 2200 pF
t
LFALL
Low-side driver fall time 24 48
ns
t
HRISE
High-side driver rise time 48 96
C
LOAD
= 2200 pF (HDRV – SW)
t
HFALL
High-side driver fall time 36 72
V
BOOST
V
BOOST
V
OH
High-level ouput voltage, HDRV I
HDRV
= –0.1 A (HDRV – SW)
–1.5 V –1.0 V
V
OL
Low-level ouput voltage, HDRV I
HDRV
= 0.1 A (HDRV – SW) 0.75
V
V
BP10
V
BP10
V
OH
High-level ouput voltage, LDRV I
LDRV
= –0.1 A
–1.4 V – 1.0 V
V
OL
Low-level ouput voltage, LDRV I
LDRV
= 0.1 A 0.5
Minimum controllable pulse width 100 150 ns
SS/SD SHUTDOWN
V
SD
Shutdown threshold voltage Outputs off 90 125 160
mV
V
EN
Device active threshold voltage 190 210 245
BOOST REGULATOR
V
BOOST
Output voltage V
IN
= 24.0 V 31.2 32.2 33.5 V
RECTIFIER ZERO CURRENT COMPARATOR (TPS40054 ONLY)
V
SW
Switch voltage LDRV output OFF –10 –5 0 mV
SW NODE
I
LEAK
Leakage current
(3)
(out of pin) 25 µA
THERMAL SHUTDOWN
Shutdown temperature
(3)
165
T
SD
°C
Hysteresis
(3)
20
UVLO
V
UVLO
KFF programmable threshold voltage R
KFF
= 28.7 kΩ 6.95 7.50 7.95
V
DD
UVLO, fixed 7.2 7.5 7.9 V
V
DD
UVLO, hysteresis 0.46
(3) Ensured by design. Not production tested.
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