CAT3606HV4-T2 ON Semiconductor, CAT3606HV4-T2 Datasheet - Page 5

• Manufacturer Part Number: CAT3606HV4-T2
• Description: IC LED DRVR WHITE BCKLGT 16-TQFN
• Manufacturer: ON Semiconductor
• Type: Backlight, White LEDr

Specifications of CAT3606HV4-T2

• Topology: PWM, Switched Capacitor (Charge Pump)
• Number Of Outputs: 6
• Internal Driver: Yes
• Type - Primary: Backlight
• Type - Secondary: White LED
• Frequency: 800kHz ~ 1.3MHz
• Voltage - Supply: 3 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: 90%
• Number Of Segments: 6
• Operating Supply Voltage: 3 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: Lead free / RoHS Compliant
• Other names: 3606HV4-T2; CAT3606HV4-T2TR

Basic Operation
it is able to drive the programmed LED current, it continues
in 1x mode. If the battery voltage drops to a level where the
LED current cannot be met, the driver automatically
switches into 1.5x mode, to boost the output voltage high
enough to achieve the nominal LED current.
the chip is powered up or is taken out of shutdown mode (via
EN pin). The use of the Main and Sub display enable pins
(ENM or ENS) does not affect the mode of operation.
LED Current Setting
connected between the RSET pin and ground. Table 5 lists
various LED currents and the associated R
for standard 1% precision surface mount resistors.
Table 5. RSET Resistor Selection
At power-up, the CAT3606 starts operation in 1x mode. If
The above sequence is reinitialized each and every time
The LED current is set by the external resistor R
LED Current (mA)
10
15
20
30
1
2
5
R
SET
SET
49.9
32.4
23.7
15.4
649
287
102
(kW)
resistor value
http://onsemi.com
SET
5
a group of LEDs as shown in Table 6.
NOTES: 1 = logic high (or VIN)
connecting the respective LED pins to VOUT. In which
case, the corresponding LED driver is disabled and the
typical LED sink current is only about 0.2 mA. When the
following equation is true on any channel, the driver turns
off the LED channel:
Note: The CAT3606 is designed to drive LEDs with forward
voltage greater than 1 V and is not compatible with resistive
loads.
Table 6. LED Selection
The enable lines ENM and ENS allow to turn On or Off
The unused LED channels can also be turned off by
EN
0
1
1
1
1
Control Lines
0 = logic low (or GND)
– = LED output OFF
X = don’t care
VOUT * V
ENM
X
1
0
1
0
LED
ENS
X
1
1
0
0
v 1 V (LED channel OFF)
LED1 − LED4
Main
ON
ON
–
–
−
LED Outputs
LED5 − LED6
Sub
ON
ON
–
–
−