FAN5622 Datasheet, PDF (5/13 Pages) Fairchild Semiconductor – Linear LED Drivers with Single-Wire Digital Interface

Electrical Specifications
V_IN = 2.7V to 5.5V, R_SET = 19.10kΩ, T_A = -40°C to +85°C, V_f = 2.5V to [3.5V or V_IN – 0.1V], whichever is smaller. Typical values
are at T_A = 25°C, V_IN = 3.6V, and V_f = 3.2V.
Symbol
Parameter
Condition
Min. Typ. Max. Unit
Power Supplies
I_SD
Shutdown Supply Current
I_IN
Operating Supply Current
I_IH
V_UVLO
Regulation
Control Pin Input Current
Under-Voltage Lockout
Threshold
V_IN = 3.6V, CTRL = 0
0.3
1.0
µA
FAN5622: V_IN = 3.6V, I_LED = 0mA
FAN5624: V_IN = 3.6V, I_LED = 0mA
0.4
0.8
mA
0.6
1.0
mA
FAN5626: V_IN = 3.6V, I_LED = 0mA
CTRL = 1.8V
0.8
1.2
mA
1
250
nA
V_IN Rising
V_IN Falling
2.50 2.70
V
2.10 2.30 2.50
V
I_{FS_LEDx (MAX)} Full-Scale LED Output Current I_LEDx = 30mA; x = 1 to 6
5
30
mA
V_IN=2.85V – 4.5V; V_CATH =0.15 to
I_LED
Absolute Current Accuracy
(1.2V or V_IN=2.55V, Whichever is
Smaller); Full-Scale Current 5-
-10
30mA, T_A = 25°C
+10
%
I_{LED MATCH} LED Current Matching⁽⁴⁾
I_LEDx = 15mA; V_LEDx=0.4V,
T_A = 25°C
-3
+3
%
V_ISET
I_SET Drive Voltage
9.53kΩ ≤ R_SET ≤ 56.2kΩ
1.20
V
I_RATIO
Current Mirror Ratio from ISET
Pin
9.53kΩ ≤ R_SET ≤ 56.2kΩ
240
∆I_{OUT_LOAD} I_OUT Load Regulation
∆I_{OUT_LINE} I_OUT Line Regulation
V_DROPOUT Dropout Voltage
V_IN = 3.6V, I_LEDx = 15mA,
LED V_F = 2.7 to 3.5V,
-3
+3
%
V_IN = 2.7 to 4.8V, I_LEDx = 15mA,
V_CATH = 0.5V
-4
+4
%
V_IN=3.6V; I_LED = 15mA, -10% I_LED
Drop
50
mV
V_IN=3.6V; I_LED = 30mA, -10% I_LED
Drop
60
Rising Temperature at Junction
150
TSD
Thermal Shutdown
°C
Hysteresis
20
Logic Input (CTRL)
V_IH
HIGH-Level Input Voltage
1.2
V
V_IL
LOW-Level Input Voltage
0.4
V
T_LO
CTRL LOW Time for Dimming V_IN = 3.6V; See Figure 17
0.5
300
µs
T_HI
Time Delay between Steps
V_IN = 3.6V; See Figure 17
0.5
µs
T_ON
CTRL HIGH to Turn-On Delay V_IN = 3.6V; See Figure 17
250
µs
T_SD
CTRL LOW, Shutdown Pulse
Width
V_IN = 3.6V; from Falling Edge of
CTRL
1
ms
Note:
4. For the two, four, and six LED current sinks of FAN5622, FAN5624, and FAN5626 respectively; the following are
determined: the maximum sink current of the two, four, and six LED outputs (MAX); the minimum sink current of the two,
four, and six outputs (MIN); and the average sink current (AVG). For all of the LED outputs, two matching numbers are
calculated: (MAX-AVG)/ AVG and (AVG-MIN)/AVG. The largest number of the two (worst case) is considered the
matching figure for the part. The matching figure for a given part is considered to be the highest matching figure of all LED
outputs. The typical specification provided is the most likely norm of the matching figure for all parts.
© 2010 Fairchild Semiconductor Corporation
FAN5622 / FAN5624 / FAN5626 • Rev. 1.0.2
5
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