MAX3967AETG+ Maxim Integrated Products, MAX3967AETG+ Datasheet - Page 7

• Manufacturer Part Number: MAX3967AETG+
• Description: IC LED DRIVER 24-TQFN
• Manufacturer: Maxim Integrated Products

Specifications of MAX3967AETG+

• Constant Current: Yes
• Number Of Outputs: 2
• Internal Driver: Yes
• Type - Primary: General Purpose
• Voltage - Supply: 2.97 V ~ 5.5 V
• Mounting Type: Surface Mount
• Package / Case: 24-TQFN Exposed Pad
• Operating Temperature: -40°C ~ 85°C
• Current - Output / Channel: 100mA
• Internal Switch(s): Yes
• Number Of Segments: 1
• Operating Supply Voltage: 2.97 V to 5.5 V
• Maximum Supply Current: 39 mA
• Maximum Power Dissipation: 1354 mW
• 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: -
• Frequency: -
• Efficiency: -
• Topology: -
• Lead Free Status / Rohs Status: Details

Figure 2. Functional Diagram
The modulation-current generator circuit provides con-
trol of the modulation-current amplitude. This amplitude
is determined by the voltage at the MODSET pin and
external resistor R
Do not connect bypass capacitors at the MODSET pin.
Capacitance at this pin increases high-frequency out-
put noise. The MON pin provides an optional modula-
tion-current monitor. The current sourced from the MON
pin is 1/96 of the modulation current. If used, the pin
should be connected to V
resistance must be chosen so the voltage on MON
does not exceed 1.1V. If not used, leave MON open.
IN+
IN-
1.2V
REFERENCE-VOLTAGE GENERATOR
TCMIN
BUFFER
Modulation-Current Generator
INPUT
MODSET.
_______________________________________________________________________________________
TCNOM
EE
TC
V
through a resistor. The
TEMP
0
TX_DISABLE
MODULATION-
CURRENT
GENERATOR
1
0
MAX3967A
270Mbps SFP LED Driver
GAIN 4X
A prebias voltage (V
LED to improve switching speed. The prebias current
generator creates a current that flows through the 78Ω
prebias resistor in the output stage, creating a prebias
voltage. The prebias voltage can be adjusted by selec-
tively connecting pins PB1, PB2, and PB3 to V
describes the functions of PB1, PB2, and PB3.
The modulation-current reference is switched and
amplified by the output stages.
LED package lead inductance causes ringing and
overshoot, which can be compensated with an RC filter
network. The MAX3967A includes 35Ω and 12pF of
MODSET
50Ω
R MODSET
V
CC
V CCOUT
MON
PB1
Prebias Current Generator
PREBIAS-CURRENT
COMPLEMENTARY
PREBIAS
GENERATOR
OUTPUT
OUTPUT
MAIN
24X
24X
PB2
Output Current Drivers
) can be applied to the
PB3
R PREBIAS
78Ω
5Ω
35Ω
12pF
EE
.
Table 1
OUT+
OUT-
7