CAT3649 Datasheet, PDF (3/14 Pages) ON Semiconductor – 6-Channel Quad-Mode LED Driver with 32 Dimming Levels & PWM

CAT3649
Figure 2. ADIM Dimming Timing Diagram (no C_PWM, PWM high)
Table 4. ELECTRICAL OPERATING CHARACTERISTICS (Notes 2 and 3)
Parameter
Symbol
Conditions
Min
Quiescent Current (excluding load)
I_Q
1x mode
1.33 x mode, V_IN = 3 V
1.5x mode, V_IN = 2.8 V
2x mode, V_IN = 2.6 V
Shutdown Current
LED Current Setting
I_QSHDN
I_LED−SET
V_ADIM = 0 V
After ADIM is first enabled
(full scale LED current)
LED Current Accuracy
LED Channel Matching
CPWM Pin Regulated Voltage
Output Resistance (open loop)
I_LED−ACC (I_LEDx – I_NOMINAL) / I_NOMINAL
−10
25 mA I_LED setting
I_LED−DEV
(I_LED − I_LEDAVG) / I_LEDAVG
−5
25 mA I_LED setting
V_CPWM
V_PWM = V_IN
R_OUT
1x mode
1.33x mode, V_IN = 3 V
1.5x mode, V_IN = 2.7 V
2x mode, V_IN = 2.4 V
Charge Pump Frequency
F_OSC
1.33x and 2x mode
0.8
1.5x mode
1
Output short circuit Current Limit
I_{SC_MAX}
V_OUT < 0.5 V
Input Current Limit
I_{IN_MAX}
V_OUT > 1 V, 1x mode
1x to 1.33x Transition Thresholds at any LED pin V_LEDTH 25 mA LED current per channel
ADIM and PWM Pins
− Pull−down resistance
R_PD
− Logic High Level
V_HI
1.3
− Logic Low Level
V_LO
Thermal Shutdown
T_SD
Thermal Hysteresis
T_HYS
Undervoltage lockout (UVLO) threshold
V_UVLO
2. Typical values are at V_IN = 3.6 V, PWM = ADIM = High, T_AMB = 25°C.
3. Min and Max values are over recommended operating conditions unless specified otherwise.
Typ
1.4
2.2
2.7
2.8
25
±2
±1.5
0.6
0.8
5
5
10
1
1.3
50
250
100
20
150
20
2.0
Max
2
4
4
4
1
+10
+5
1.3
1.6
0.4
Unit
mA
mA
mA
%
%
V
W
MHz
mA
mA
mV
MW
V
V
_C
_C
V
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