CAT3644HV3-GT2 ON Semiconductor, CAT3644HV3-GT2 Datasheet - Page 4

• Manufacturer Part Number: CAT3644HV3-GT2
• Description: IC LED DVR 4CH QUAD MODE 16TQFN
• Manufacturer: ON Semiconductor
• Series: QUAD-Mode®r
• Type: Backlight, White LEDr

Specifications of CAT3644HV3-GT2

• Topology: Linear (LDO), Switched Capacitor (Charge Pump)
• Number Of Outputs: 4
• Internal Driver: Yes
• Type - Primary: Backlight
• Type - Secondary: White LED
• Frequency: 800kHz ~ 1.6MHz
• Voltage - Supply: 2.5 V ~ 5.5 V
• Voltage - Output: 7V
• Mounting Type: Surface Mount
• Package / Case: 16-TFQFN Exposed Pad
• Operating Temperature: -40°C ~ 85°C
• Current - Output / Channel: 25mA
• Internal Switch(s): Yes
• Efficiency: 92%
• Number Of Digits: 4
• Low Level Output Current: 25 mA
• High Level Output Current: 100 mA
• Operating Supply Voltage: 2.5 V to 5.5 V
• Maximum Supply Current: 30 mA
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

LED Current Setting
connected between the RSET pin and ground. Table 5 lists
standard resistor values for several LED current settings.
Table 4. RECOMMENDED EN/DIM TIMING
(For 2.4 V ≤ V
Table 5. RESISTOR RSET AND LED CURRENT
T
The nominal LED current is set by the external resistor
Symbol
T
PWRDWN
SETUP
T
T
T
LED
LO
HI
LED Current (mA)
LED
Current
EN/DIM
IN
10
15
20
25
30
2
5
EN/DIM setup from shutdown
EN/DIM program low time
EN/DIM program high time
EN/DIM low time to shutdown
LED current settling time
≤ 5.5 V, over full ambient temperature range −40°C to +85°C.)
Shutdown
T
SETUP
T
LED
Name
100%
Figure 2. EN/DIM Digital Dimming Timing Diagram
RSET (kW)
40.0
15.8
7.87
5.23
4.02
3.16
2.67
T
50%
LO
http://onsemi.com
T
HI
25%
Conditions
4
12.5% 6.25%
3.12%
100%
Min
0.2
0.2
1.5
10
T
PWRDWN
Typ
40
Max
100
Shutdown
Units
ms
ms
ms
ms
ms