MC34844AEP Datasheet, PDF (38/62 Pages) Freescale Semiconductor, Inc – 10 Channel LED Backlight Driver with Integrated Power Supply

MC34844A
ELECTRICAL CHARACTERISTICS
STATIC AND DYNAMIC ELECTRICAL CHARACTERISTICS
Table 11. Static and Dynamic Electrical Characteristics (continued)
Characteristics noted under conditions V_IN = 12 V, V_OUT = 42 V, PWM = VDC1, M/~S = VDC1, PIN & NIN = VDC1,
-40°C ≤ T_A ≤ 105°C, PGND = 0 V, unless otherwise noted.
Characteristic
Symbol
Min
Typ
Max
Unit
Line Regulation ^{(21) -} VIN=7.0 to 28 V
Load Regulation ^{(21) -} VLED = 8.0 to 65 V (all Channels)
Slope compensation voltage ramp - R_SLOPE = 68 kΩ
Current Sense Amplifier Gain
I_OUT/V_IN
-0.2
-
0.2
%/V
I_OUT/V_LED
-0.2
-
0.2
%/V
V_SLOPE
-
0.49
-
V/μs
A_CSA
-
9.0
-
Current Sense Resistor
OTA Transconductance
Transconductance Sink and Source Current Capability
R_SENSE
-
22
-
mΩ
G_M
-
200
-
μS
I_SS
-
100
-
μA
FAIL PIN
Off-state Leakage Current - V_FAIL = 5.5 V
On-state Voltage Drop - I_SINK = 4.0 mA
LED CHANNELS
I_{FAIL_LEAK}
-
V_OL
-
-
50
μA
-
0.4
V
Sink Current
ICHx Register = 255, PIN&NIN = Disabled, T_A=25 °C
RISET=3.48 kΩ, 0.1%
I_SINK
mA
78.4
80
81.6
Regulated minimum voltage across drivers
Pulse Width > 400 ns
Current Matching Accuracy
I_SET Pin Voltage
RISET=3.48 kΩ, 0.1%
LED Current Amplitude Resolution
1.0 mA < I_LED < 80 mA
V_MIN
mV
625
700
775
I_MATCH
-2.0
-
2.0
%
V_SET
V
2.007
2.048
2.069
ILED_RES
%
-
1.5
-
Off-state Leakage Current, All channels - (V_CH = 45 V)
PIN INPUT
I_{CH_LEAK}
-
-
10
μA
Voltage to Disable PIN mode
PIN Bias Current
PIN = V_SET
Analog Dimming Current
ICHx Register = 255, RISET=3.48 kΩ 0.1%
PIN = V_SET/2
PIN = V_SET
V_{PIN_DIS}
2.2
-
-
V
I_PIN
-2.0
-
2.0
μA
I_{DIM_PIN}
36
40
44
mA
76
80
84
Notes
21. Guaranteed by design
34844A
38
Analog Integrated Circuit Device Data
Freescale Semiconductor