CAT3661 Datasheet, PDF (3/12 Pages) ON Semiconductor – 1-Channel Low-Power LED Driver

CAT3661
Table 4. ELECTRICAL OPERATING CHARACTERISTICS
(Recommended operating conditions unless otherwise specified. C_IN, C_OUT−, C_FLY are 1 mF ceramic capacitors and V_IN is set to 3.6 V)
Parameter
Conditions
Symbol Min
Typ Max
Unit
Quiescent Current
Shutdown Current
LED Current Accuracy (Chip to Chip)
LED Current Accuracy
Gain (I_LED / I_RSET)
RSET Regulated Voltage
Output Resistance (open loop)
Charge Pump Frequency
1x mode, no load, V_IN = 3.4 V
I_Q
1.33x mode, no load, V_IN = 3.0 V
1.5x mode, no load, V_IN = 2.4 V
2x mode, no load, V_IN = 2.1 V
130
mA
160
160
160
V_EN = 0 V
I_QSHDN
1
mA
(I_LED − I_LEDNOM ) / I_LEDNOM
I_LED−ACC
±2
%
R_SET = 60 kW
I_LED−3
2.7
3
3.3
mA
I_LED = 3 mA
Gain
300
I_LED = 3 mA
V_RSET
0.57
0.6
0.63
V
1x mode
1.33x mode, V_IN = 3 V
1.5x mode, V_IN = 2.7 V
2x mode, V_IN = 2.4 V
R_OUT
15
W
40
50
100
1.33x and 2x mode
1.5x mode
F_OSC
100
kHz
130
Input Current Limit Gain from I_RSET
LED Channel Short Detection Voltage
LED Channel Short Test Current
LED Channel Open/Short Timeout
1x to 1.33x or 1.33x to 1.5x or 1.5x to 2x
Transition Thresholds at LED pin
I_LED = 3 mA
I_LED = 3 mA
V_OUT – V_LED < V_SH
I_LED = 3 mA
G_{I_MAX}
1000
V_SH
1
V
I_SH
5
mA
T_OLED
2
ms
LED_TH
mV
100
1x Mode Transition Hysteresis
Transition Filter Delay
nFLTB, nFLTL low voltage threshold
(Open Drain)
I_LED = 3 mA
nFLTB, nFLTL Driven low 100 mA
pull up
V_HYS
T_DF
V_FLTLO
360
mV
400
ms
0.2
V
EN Pin
− Internal Pull−down Resistor
− Logic High Level
− Logic Low Level
R_EN
200
kW
V_EHI
1.3
V
V_ELO
0.4
V
Thermal Shutdown
Thermal Hysteresis
Low battery Vin Trip point Voltage
ADJH = V_IN
ADJL = GND
T_SD
150
_C
T_HYS
20
_C
V_LB
2.30 2.40 2.50
V
Low Battery ADJ Trip Point (Internal)
V_IN = 2.4 V
V_ADJ
0.57
0.6
0.63
V
Low Battery Divider Network Resistance
R_HI + R_LO
R_ADJ
640
800
960
kW
Low Battery Resistor Divider Gain
(R_HI + R_LO) / R_LO
G_ADJ
4
Low battery nFLTB Pulse Duration
Upon EN, VIN = 2.4 V
T_BATTLO
400
500
600
ms
Undervoltage lockout (UVLO) threshold
V_UVLO
1.9
V
Product parametric performance is indicated in the Electrical Characteristics for the listed test conditions, unless otherwise noted. Product
performance may not be indicated by the Electrical Characteristics if operated under different conditions.
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