LM3424 Datasheet, PDF (6/69 Pages) National Semiconductor (TI) – Constant Current N-Channel Controller with Thermal Foldback for Driving LEDs

LM3424, LM3424-Q1
SNVS603C – AUGUST 2009 – REVISED AUGUST 2015
www.ti.com
6.6 Electrical Characteristics
MIN and MAX limits apply over the full Operating Temperature Range (T_A = T_J = −40°C to 125°C) unless otherwise specified.
Minimum and Maximum limits are ensured through test, design, or statistical correlation. Unless otherwise stated the following
condition applies: T_J = 25°C, V_IN = 14 V.
PARAMETER
TEST CONDITIONS
MIN ⁽¹⁾ TYP ⁽²⁾
MAX ⁽¹⁾
UNIT
STARTUP REGULATOR (V_CC)
V_CC-REG
V_CC Regulation
I_CC-LIM
V_CC Current Limit
I_Q
Quiescent Current
I_SD
Shutdown Current
V_CC-UVLO
V_CC UVLO Threshold
V_CC-HYS
ENABLE (EN)
V_CC UVLO Hysteresis
I_CC = 0 mA
V_CC = 0 V
EN = 3 V, Static
EN = 0 V, MAX: T_J = 25°C
V_CC Increasing
V_CC Decreasing
6.3
6.9
20
25
2
0.1
4.17
3.7 4.08
0.1
7.35
V
mA
3
mA
1
µA
4.50
V
V
V
V_EN-ST
EN Startup Threshold
EN Increasing
EN decreasing
1.75
0.8 1.63
2.4
V
V
V_EN-HYS
EN Startup Hysteresis
R_EN
EN Pull-down Resistance
OVER-VOLTAGE PROTECTION (OVP)
0.1
0.45 0.82
V
1.30
MΩ
V_TH-OVP
OVP OVLO Threshold
I_HYS-OVP
OVP Hysteresis Source Current
ERROR AMPLIFIER
OVP Increasing
OVP Active (high)
1.185 1.24
1.285
V
13
20
27
µA
V_CSH
CSH Reference Voltage
Error Amplifier Input Bias Current
COMP Sink / Source Current
With Respect to GND
MIN, MAX: T_J = 25°C
1.21 1.235
–0.6
0
17
26
1.26
V
0.6
µA
35
µA
Transconductance
Linear Input Range
Transconductance Bandwidth
See ⁽³⁾
–6-dB Unloaded Response⁽³⁾
100
±125
1
µA/V
mV
MHz
OSCILLATOR (RT)
f_SW
Switching Frequency
V_RT-SYNC
Sync Threshold
PWM COMPARATOR
R_T = 36 kΩ
R_T = 12 kΩ
164
207
525
597
3.5
250
kHz
669
kHz
V
V_CP-BASE
COMP to PWM Offset - No Slope
Compensation
750
900
1050
mV
SLOPE COMPENSATION (SLOPE)
ΔV_CP
Slope Compensation Amplitude
Additional COMP to PWM Offset
- SLOPE sinking 100 µA
85
mV
CURRENT LIMIT (IS)
V_LIM
Current Limit Threshold
V_LIM Delay to Output
t_ON-MIN
Leading Edge Blanking Time
HIGH SIDE TRANSCONDUCTANCE AMPLIFIER
215
245
35
140
240
275
mV
75
ns
340
ns
Input Bias Current
10
µA
Transconductance
20
mA/V
Input Offset Current
–1.5
0
1.5
µA
Input Offset Voltage
–5
0
5
mV
(1) All limits ensured at room temperature (standard typeface) and at temperature extremes (bold typeface). All room temperature limits are
100% production tested. All limits at temperature extremes are ensured via correlation using standard Statistical Quality Control (SQC)
methods. All limits are used to calculate Average Outgoing Quality Level (AOQL).
(2) Typical numbers are at 25°C and represent the most likely norm.
(3) These electrical parameters are ensured by design, and are not verified by test.
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