Datasheet


SGLS318 − NOVEMBER 2005
5
www.ti.com
ELECTRICAL CHARACTERISTICS
V
CC
= 18 V, R
T
= 8.2 kΩ, C
T
= 1.5 nF, V
PKLMT
= 1 V, V
VRMS
= 1.5 V, I
IAC
= 100 µA, I
ISENSE
= 0 V, V
CAO
= 3.5 V, V
VAO
= 5 V, V
VSENSE
= 3 V
PARAMETER
TEST CONDITIONS MIN TYP MAX UNIT
OSCILLATOR
Initial accuracy T
A
= 25°C 85 100 115 kHz
Voltage stability 12 V ≤ V
CC
≤ 18 V 1%
Total variation Line, temperature 80 120 kHz
Ramp amplitude (peak-to-peak) 4.9 5.9
V
Ramp valley voltage 0.8 1.3
V
ENABLE/SOFT-START/CURRENT LIMIT
Enable threshold voltage 2.35 2.55 2.80 V
Enable hysteresis V
FAULT
= 2.5 V 500 600 mV
Enable input bias current V
ENA
= 0 V −2 −5 µA
Propagation delay to disable time
(1)
Enable overdrive = 100 mV 300 ns
Soft-start charge current V
SS
= 2.5 V 10 14 24 µA
Peak limit offset voltage −15 15 mV
Peak limit input current V
PKLMT
= −0.1 V −200 −100 µA
Peak limit propagation delay time
(1)
150 ns
MULTIPLIER
Output current, I
AC
limited
I
AC
= 100 µA, V
RMS
= 1 V,
R
SET
= 10 kΩ
−220 −200 −170
A
Output current, zero I
AC
= 0 µA, R
SET
= 10 kΩ −2 −0.2 2
µA
Output current, power limited V
RMS
= 1.5 V, Va = 6 V −230 −200 −170
V
RMS
= 1.5 V, Va = 2 V −22 µA
Output current
V
RMS
= 1.5 V, Va = 5 V −156
Output current
V
RMS
= 5 V, Va = 2 V
−2
µA
V
RMS
= 5 V, Va = 5 V −14
µA
Gain constant
(2)
V
RMS
= 1.5 V, Va = 6V, T
A
= 25°C −1.1 −1 −0.9 A/A
GATE DRIVER
V
OH
High-level output voltage I
OUT
= −200 mA, V
CC
= 15 V 12 12.8
V
V
OL
Low-level output voltage I
OUT
= 200 mA 1 2.2
V
I
OUT
= 10 mA 300 500 mV
Low-level UVLO voltage I
OUT
= 50 mA, V
CC
= 0 V 0.9 1.5 V
Output rise time
(1)
C
LOAD
= 1 nF 35
ns
Output fall time
(1)
C
LOAD
= 1 nF 35
ns
Output peak current
(1)
C
LOAD
= 10 nF 1.0 A
(1)
Ensured by design. Not production tested.
(2)
Gain constant. (K) +
I
IAC
ǒ
V
VAO
* 1.5 V
Nj
ƪ
ǒ
V
VRMS
Ǔ
2
I
MOUT
ƫ