CAT3649_14 Datasheet, PDF (3/13 Pages) ON Semiconductor – 6-Channel 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
Typ
Max Unit
Quiescent Current (excluding load)
Shutdown Current
LED Current Setting
I_Q
I_QSHDN
I_LED−SET
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
V_ADIM = 0 V
After ADIM is first enabled
(full scale LED current)
1.4
2
mA
2.2
4
2.7
4
2.8
4
1
mA
25
mA
LED Current Accuracy
LED Channel Matching
CPWM Pin Regulated Voltage
Output Resistance (open loop)
Charge Pump Frequency
I_LED−ACC
I_LED−DEV
V_CPWM
R_OUT
F_OSC
(I_LEDx – I_NOMINAL) / I_NOMINAL
25 mA I_LED setting
(I_LED − I_LEDAVG) / I_LEDAVG
25 mA I_LED setting
V_PWM = V_IN
1x mode
1.33x mode, V_IN = 3 V
1.5x mode, V_IN = 2.7 V
2x mode, V_IN = 2.4 V
1.33x and 2x mode
1.5x mode
−10
±2
+10
%
−5
±1.5
+5
%
0.6
V
0.8
W
5
5
10
0.8
1
1.3
MHz
1
1.3
1.6
Output short circuit Current Limit
I_{SC_MAX}
V_OUT < 0.5 V
50
mA
Input Current Limit
I_{IN_MAX}
V_OUT > 1 V, 1x mode
250
mA
1x to 1.33x Transition Thresholds at any LED pin V_LEDTH 25 mA LED current per channel
100
mV
ADIM and PWM Pins
− Pull−down resistance
R_PD
− Logic High Level
V_HI
− Logic Low Level
V_LO
20
MW
1.3
V
0.4
V
Thermal Shutdown
T_SD
150
_C
Thermal Hysteresis
T_HYS
20
_C
Undervoltage lockout (UVLO) threshold
V_UVLO
2.0
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.
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.
http://onsemi.com
3