LM3463_12 Datasheet, PDF (8/40 Pages) Texas Instruments – LM3463 Dynamic Headroom Controller with Thermal Control Interface and Individual Channel Dimming Control

LM3463
SNVS807 – MAY 2012
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Electrical Characteristics (continued)
Specification with standard type are for T_A = T_J = +25°C only; limits in boldface type apply over the full Operating Junction
Temperature (T_J) range. Minimum and Maximum are guaranteed through test, design or statistical correlation. Typical values
represent the most likely parametric norm at T_J = +25°C, and are provided for reference purposes only. Unless otherwise
stated, the following conditions apply: V_IN = 48V.
Symbol
Parameter
Conditions
Min
Typ Max Units
V_VLedFB-TH
VLedFB Voltage Threshold for Turning V_VLedFB Increasing
LEDs ON
2.325 2.500 2.625 V
V_VLedFB-HYS
V_{VLedFBEN-SLAVE}
VLedFB Voltage Hysteresis
VLedFB Pin Voltage Threshold for
Slave Mode
V_VLedFB decreasing
Measure at VLedFB pin
1.21
V
5.15 5.39 5.60
V
V_OutP-MAX
V_OutP-MIN
V_ISR
OutP Max. Output Voltage
OutP Min. Output Voltage
ISR Pin Voltage
I_OutP = 1mA
Current Sink
V_CDHC = 0.5V
I_OutP =1mA
Current Sink
V_CDHC = 3.5V
I_ISR = 1µA
Current Sink to GND
2.90 3.10 3.25
V
0.050 0.120 0.235 V
1.226 1.307 1.382 V
I_ISR = 10µA
Current Sink to GND
1.195 1.240 1.285 V
I_ISR = 100µA
Current Sink to GND
1.075 1.125 1.175 V
I_CDHC-SOURCE
I_CDHC-SINK
R_CDHC-SOURCE
R_CDHC-SINK
gm_CDHC-OTA
CDHC Pin Max. Sourcing Current
CDHC Pin Max. Sinking Current
CDHC Pin Output Impedance
CDHC Pin Output Impedance
CDHC Pin OTA Transconductance
LED Current Regulator
Any V_DRn < 0.9V
Any V_DRn > 0.9V
Sourcing current from CDHC pin
Sinking current from CDHC pin
V_DRn ≥ 0.9V
V_DRn < 0.9V
15
26
35
µA
20
33
45
µA
1.20 1.70 2.25 MΩ
0.7
1.1
1.4
MΩ
75
µmho
17
µmho
V_GDn-MAX
GDn Gate Driver Maximum Output
Voltage
V_SEn = 0V
5.30 5.75 6.20
V
I_GDn-MAX
I_DRn-MAX
V_SEn
GDn Gate Driver Short Circuit Current
DRn pin Maximum Input Current
Output Current Sensing Reference
Voltage w.r.t V_REFRTN
Fault Detection and Handling
V_GDn = 0V
V_DRn = 80V
V_IOUTADJ = V_VREF
V_IOUTADJ = V_VREF / 2
V_IOUTADJ = V_REFRTN
10
16
mA
35
50
65
µA
190
200 210 mV
85
100 115 mV
2.0
4.6
6.5
mV
V_{SEn-LED-OPEN-FLT}
LED Open Fault Detection Voltage
Threshold at SEn Pin
Measure at SEn pin
43
mV
I_{SEn-LED-OPEN-FLT}
LED Open Fault Detection Current
Threshold at SEn Pin
Measure at SEn pin
15
22
30
µA
V_{DRn-LED-NORMAL}
LED Open Fault Detection Voltage
Threshold at DRn Pin
Measure at DRn pin
330
mV
I_FCAP-CHG
V_FCAP-FLT-TH
Fault Cap. Charging Current
FCAP Pin Fault Confirm Voltage
Threshold
Fault = True
Measure at FCAP pin
20
28
40
µA
3.3
3.6
3.9
V
V_FCAP-RST-TH
FCAP Pin Fault Reset Voltage
Threshold
Measure at FCAP pin
85
157 230 mV
Device Enable
V_EN-ENABLE
EN Pin Voltage Threshold for Device
Enable
2.6
3.3
V
V_EN-DISABLE
EN Pin Voltage Threshold for Device
Disable
1.9
2.5
V
V_EN-HYS
Device Enable Hysteresis
100
mV
8
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