LM3424BSTEVAL National Semiconductor, LM3424BSTEVAL Datasheet - Page 5

• Manufacturer Part Number: LM3424BSTEVAL
• Description: LM3424 Constant Current N-Channel Controller with Thermal Foldback for Driving LEDs; Qty per Container: 1/
• Manufacturer: National Semiconductor

OSCILLATOR (RT)
f
V
PWM COMPARATOR
V
SLOPE COMPENSATION (SLOPE)
ΔV
CURRENT LIMIT (IS)
V
t
HIGH SIDE TRANSCONDUCTANCE AMPLIFIER
GATE DRIVER (GATE)
R
R
UNDER-VOLTAGE LOCKOUT and DIM INPUT (nDIM)
V
I
DIM DRIVER (DDRV)
R
R
SOFT-START (SS)
I
THERMAL CONTROL
V
I
I
SW
ON-MIN
HYS-nDIM
SS
TGAIN-MAX
TF
RT-SYNC
CP-BASE
LIM
TH-nDIM
S
SRC-GATE
SNK-GATE
SRC-DDRV
SNK-DDRV
CP
Symbol
Switching Frequency
Sync Threshold
COMP to PWM Offset - No
Slope Compensation
Slope Compensation
Amplitude
Current Limit Threshold
V
Leading Edge Blanking Time
Input Bias Current
Transconductance
Input Offset Current
Input Offset Voltage
Transconductance
Bandwidth
GATE Sourcing Resistance
GATE Sinking Resistance
nDIM / UVLO Threshold
nDIM Hysteresis Current
DDRV Sourcing Resistance DDRV = High
DDRV Sinking Resistance
nDIM rising to DDRV rising
nDIM rising to DDRV falling
Soft-start current
V
TREF input bias current
TSENSE Input Bias Current V
TGAIN Maximum Sourcing
Current
CSH Current with High-side
Amplifier Disabled
LIM
S
Voltage
Delay to Output
Parameter
R
R
Additional COMP to PWM Offset -
SLOPE sinking 100 µA
I
GATE = High
GATE = Low
DDRV = Low
I
I
V
V
V
V
R
kΩ
CSH
VS
VS
TREF
TSENSE
TREF
TSENSE
TGAIN
T
T
TGAIN
= 36 kΩ
= 12 kΩ
= 0A
= 1 mA
= 100 µA
= 1.5V
= 1.5V
= 2V
= 10
= 1.5V
= 1.5V
Conditions
V
V
V
V
V
V
TREF
TSENSE
TREF
TSENSE
TREF
TSENSE
(Note
5
= 1.5V
= 1.5V
= 1.5V
7)
= 0.5V
= 1.4V
= 1.5V
(Note
1.185
2.40
Min
164
525
750
215
140
-1.5
200
20
13
-5
5)
(Note
1.240
13.5
2.45
Typ
207
597
900
245
240
500
700
360
600
100
3.5
2.0
1.3
3.5
0.1
0.1
85
35
10
20
10
10
0
0
2
6)
(Note
1.285
1050
Max
30.0
10.0
2.50
250
669
275
340
1.5
6.0
4.5
75
27
5
5)
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Units
mA/V
kHz
kHz
mV
mV
mV
mV
µA
µA
µA
µA
µA
ns
ns
Ω
Ω
V
V
V