CAT3636HV3-T2 ON Semiconductor, CAT3636HV3-T2 Datasheet - Page 10

• Manufacturer Part Number: CAT3636HV3-T2
• Description: IC LED DRVR WHITE BCKLGT 16-TQFN
• Manufacturer: ON Semiconductor
• Series: QUAD-Mode®r
• Type: Backlight, White LEDr

Specifications of CAT3636HV3-T2

• Topology: Switched Capacitor (Charge Pump)
• Number Of Outputs: 6
• Internal Driver: Yes
• Type - Primary: Backlight
• Type - Secondary: RGB, 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: 32mA
• 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: 3636HV3-T2; CAT3636HV3-T2TR

Register Configuration and Programming
of LEDs to be turned on. A low LED current mode exists to
allow for very low current operation under 4 mA per
channel. If IMODE equals 1, the high current range is
selected up to 32 mA. If IMODE is set to 0, all currents are
divided by 8. Each bank of LEDs (A, B or C) can be turned
on independently by setting the respective bit ENA, ENB,
ENC to 1, as shown in Table 7. For example, to enable all 6
LEDs in low current mode, REG1 is programmed to 0111
binary (9 data pulses).
channels. REG3, REG4, REG5 allow to set the current
respectively in banks A, B and C. The three banks can be
programmed with independent current values.
Table 6. REGISTER ADDRESS AND DATA
Table 7. REG1 REGISTER SETTING
Pulses
Register REG1 allows to set the mode and select the pairs
Register REG2 allows to set the same current for all 6
Data
10
12
13
14
15
16
11
Register
0
1
2
3
4
5
6
7
8
9
REG1
REG2
REG3
REG4
REG5
REG6
REG1 Value
(binary)
0000
1010
1001
1000
0101
0100
0010
0001
0000
1110
1101
1100
1011
0111
0110
0011
1111
Address
Pulses
1
2
3
4
5
6
IMODE
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
Bank Enable and IMODE
Bank A Current Setting
Bank B Current Setting
Bank C Current Setting
ENA
Global Current Setting
On
On
On
On
On
On
On
On
−
−
−
−
−
−
−
−
−
Return Lockout
Bank Enable
Description
ENB
On
On
On
On
On
On
On
On
−
−
−
−
−
−
−
−
−
http://onsemi.com
ENC
On
On
On
On
On
On
On
On
−
−
−
−
−
−
−
−
−
10
stops the charge pump returning to 1x mode. One pulse sets
it to 1. Two pulses or no pulses set RTLKO to 0. When
RTLKO is set to 1, the charge pump cannot automatically
return to 1x mode when in one of the charge pump modes.
The device can however move from 1x to 1.33x to 1.5x to
2x if the input voltage is not sufficient to drive the
programmed LED currents.
addressed. This forces the charge pump to start from 1x
mode and reassess the correct mode it should be in to drive
the LEDs most efficiently. If the input voltage has risen or
the device has been reprogrammed to other LED values, it
is recommended to trigger this reset allowing the charge
pump to run in the most efficient mode.
EN/SET is held low for 1.5 ms or more. All registers are
reset back to zero when the device is placed in shutdown.
Table 8. REG2−5 CURRENT SETTING REGISTERS
Pulses
REG6 contains the return lockout (RTLKO) bit. This
REG6 also triggers a charge pump reset as soon as it is
The CAT3636 enters a “zero current” shutdown mode if
Data
Bits
10
11
12
13
14
15
16
0
1
2
3
4
5
6
7
8
9
4
4
4
4
4
1
REGx Value
IMODE
Bit 3
(binary)
0000
1010
1001
1000
0101
0100
0010
0001
0000
1110
1101
1100
1011
0111
0110
0011
1111
See Table 8 for values
Bit 2
ENA
LED Current
DATA Pattern
IMODE = 0
3.75 mA
3.25 mA
2.75 mA
2.25 mA
1.75 mA
1.25 mA
0.75 mA
0.25 mA
0.0 mA
3.5 mA
2.5 mA
1.5 mA
0.5 mA
0.0 mA
3 mA
2 mA
1 mA
Bit 1
ENB
LED Current
IMODE = 1
32 mA
30 mA
28 mA
26 mA
24 mA
22 mA
20 mA
18 mA
16 mA
14 mA
12 mA
10 mA
2 mA
8 mA
6 mA
4 mA
2 mA
RTLKO
Bit 0
ENC