cat3649 ON Semiconductor, cat3649 Datasheet - Page 3

• Manufacturer Part Number: cat3649
• Description: Cat3649 6-channel Quad-mode Led Driver With 32 Dimming Levels & Pwm
• Manufacturer: ON Semiconductor

2. Typical values are at V
3. Min and Max values are over recommended operating conditions unless specified otherwise.
Table 4. ELECTRICAL OPERATING CHARACTERISTICS
Quiescent Current (excluding load)
Shutdown Current
LED Current Setting
LED Current Accuracy
LED Channel Matching
CPWM Pin Regulated Voltage
Output Resistance (open loop)
Charge Pump Frequency
Output short circuit Current Limit
Input Current Limit
1x to 1.33x Transition Thresholds at any LED pin
ADIM and PWM Pins
Thermal Shutdown
Thermal Hysteresis
Undervoltage lockout (UVLO) threshold
− Pull−down resistance
− Logic High Level
− Logic Low Level
Parameter
IN
= 3.6 V, PWM = ADIM = High, T
Figure 2. ADIM Dimming Timing Diagram (no C
I
I
I
Symbol
I
LED−ACC
LED−DEV
LED−SET
I
V
I
V
SC_MAX
V
IN_MAX
QSHDN
R
F
T
LEDTH
CPWM
R
V
T
V
UVLO
OSC
HYS
I
OUT
SD
Q
PD
LO
HI
http://onsemi.com
AMB
= 25°C.
25 mA LED current per channel
(I
After ADIM is first enabled
LEDx
(I
(Notes 2 and 3)
3
1.33 x mode, V
1.5x mode, V
(full scale LED current)
LED
1.5x mode, V
1.33x mode, V
2x mode, V
2x mode, V
V
1.33x and 2x mode
25 mA I
25 mA I
OUT
– I
− I
V
V
V
Conditions
NOMINAL
1.5x mode
OUT
LEDAVG
ADIM
PWM
> 1 V, 1x mode
1x mode
1x mode
LED
LED
< 0.5 V
= 0 V
= V
IN
IN
IN
IN
) / I
) / I
setting
setting
= 2.6 V
IN
= 2.4 V
IN
= 2.8 V
IN
= 2.7 V
LEDAVG
= 3 V
PWM
= 3 V
NOMINAL
, PWM high)
Min
−10
0.8
1.3
−5
1
±1.5
Typ
250
100
150
1.4
2.2
2.7
2.8
0.6
0.8
1.3
2.0
25
10
50
20
20
±2
5
5
1
Max
+10
1.3
1.6
0.4
+5
2
4
4
4
1
MHz
Unit
MW
mA
mA
mA
mA
mV
mA
_C
_C
%
%
W
V
V
V
V