Datasheet

LM5034
www.ti.com SNVS347A –FEBRUARY 2005–REVISED APRIL 2013
Electrical Characteristics (continued)
Specifications with standard typeface are for T
J
= 25°C, and those with boldface type apply over full Operating Junction
Temperature range. VIN = 48V, VCC1 = VCC2 = 10V externally applied, R
T
= R
DCL
= 42.2kΩ, R
OVLP
=70kΩ, UVLO = 1.5V,
unless otherwise stated. See
(1)
and
(2)
.
Symbol Parameter Conditions Min Typ Max Units
I
COMP
COMP1 (COMP2) short circuit COMP1 (COMP2) = 0V 0.6 1 1.4 mA
current
COMP1 (COMP2) to PWM1 0.33 V/V
(PWM2) gain
Minimum duty cycle SS1 (SS2) = 0V 0 %
Maximum duty cycle 1 UVLO pin = 1.30V, R
DCL
= R
T
, COMP1 76 %
(COMP2) = open
Maximum duty cycle 2 UVLO pin = 3.75V, R
DCL
= R
T
, COMP1 20 %
(COMP2) = open
Maximum duty cycle 3 UVLO pin = 1.30V, R
DCL
= R
T
/4, COMP1 20 %
(COMP2) = open
Maximum duty cycle 4 UVLO pin = 2.50V, R
DCL
= R
T
, COMP1 50 %
(COMP2) = open
Maximum duty cycle 5 UVLO pin = 1.30V, R
DCL
= R
T
/2, COMP1 40 %
(COMP2) = open
Slope compensation Delta increase at PWM comparator to CS1 90 mV
(CS2)
Channel mismatch CS1 (CS2) = 0.25V 7 %
Soft-start to COMP offset SS1 (SS2) = 0.8V 0 V
Main Output Drivers (OUT1, OUT2)
Output high voltage I
OUT
= 50mA (source) VCC-1 VCC-0.2 V
Output low voltage I
OUT
= 100 mA (sink) 0.3 1 V
Rise time C
LOAD
= 1 nF 12 ns
Fall time C
LOAD
= 1 nF 10 ns
Peak source current 1.5 A
Peak sink current 2.5 A
Active Clamp Output Drivers (AC1, AC2)
Output high voltage I
OUT
= 10mA (source) VCC-0.5 VCC-0.2 V
Output low voltage I
OUT
= 20 mA (sink) 0.1 0.5 V
Rise time C
LOAD
= 1.0 nF 44 ns
Fall time C
LOAD
= 1.0 nF 22 ns
Peak source current 0.1 A
Peak sink current 0.25 A
Overlap time R
OVLP
= 70 kΩ 75 100 125 ns
Thermal Shutdown
T
SD
Shutdown temperature 165 °C
Hysteresis 20 °C
Thermal Resistance
θ
JA
Junction to ambient, 0 LFPM Air TSSOP-20 package 120 °C/W
Flow
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