CAT3637HV3-GT2 ON Semiconductor, CAT3637HV3-GT2 Datasheet - Page 10

• Manufacturer Part Number: CAT3637HV3-GT2
• Description: IC LED DRVR WHITE BCKLGT 16-TQFN
• Manufacturer: ON Semiconductor
• Series: QUAD-Mode®r
• Type: Backlight, White LEDr

Specifications of CAT3637HV3-GT2

• Topology: Switched Capacitor (Charge Pump)
• Number Of Outputs: 6
• Internal Driver: Yes
• Type - Primary: Backlight
• Type - Secondary: White LED
• Frequency: 600kHz ~ 1.4MHz
• Voltage - Supply: 2.5 V ~ 5.5 V
• Mounting Type: Surface Mount
• Package / Case: 16-TFQFN Exposed Pad
• Operating Temperature: -40°C ~ 85°C
• Current - Output / Channel: 30mA
• Internal Switch(s): Yes
• Efficiency: 92%
• Number Of Segments: 6
• Operating Supply Voltage: 2.5 V to 5.5 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Output: -
• Lead Free Status / Rohs Status: Details
• Other names: CAT3637HV3-GT2TR

Simplified Block Diagram
Basic Operation
where the output will be approximately equal to the input
supply voltage (less any internal voltage losses). If the
output voltage is sufficient to regulate all LED currents, the
device remains in 1x operating mode.
the regulated current cannot be maintained, the device
automatically switches into 1.33x mode (after a fixed delay
time of about 120 ms). In 1.33x mode, the output voltage is
approximately equal to 1.33 times the input supply voltage
(less any internal voltage losses).
where the regulated currents cannot be maintained, the
V
At power−up, the CAT3637 starts operating in 1x mode
If the output voltage is insufficient or falls to a level where
If the output voltage is still insufficient or falls to a level
EN/SET
IN
100 kΩ
Registers
Interface
Serial
1.33x, 1.5x, 2x Charge Pump
C
0.8, 1.1 MHz
Setting DAC
1−
Reference
Oscillator
Voltage
Current
Figure 23. CAT3637 Functional Block Diagram
1x mode (LDO)
C
1+
C
2−
http://onsemi.com
Mode Control
C
2+
10
device will automatically switch to the 1.5x mode (after a
fixed delay time of about 400 ms). In 1.5x mode, the output
is approximately equal to 1.5 times the input supply voltage
(less any internal voltage losses).
it will automatically switch into 2x mode where the output
is approximately equal to 2 times the input supply voltage
(less any internal voltage losses).
LED currents in 1x mode, it will revert back to 1x mode. This
only applies for changing back to the 1x mode.
If the output voltage is still insufficient to drive the LEDs,
If the device detects a sufficient output voltage to drive all
GND
6 Current
Regulators
V
LED1
LED2
LED3
LED4
LED5
LED6
OUT