BH76806FVM-TR Rohm Semiconductor, BH76806FVM-TR Datasheet - Page 5

• Manufacturer Part Number: BH76806FVM-TR
• Description: IC VIDEO DRIVER CAP-LESS 8MSOP
• Manufacturer: Rohm Semiconductor

Specifications of BH76806FVM-TR

• Applications: Driver
• Number Of Circuits: 1
• Current - Supply: 16mA
• Current - Output / Channel: 30mA
• Voltage - Supply, Single/dual (±): 2.5 V ~ 3.45 V, ±1.25 V ~ 1.725 V
• Mounting Type: Surface Mount
• Package / Case: 8-VSSOP, 8-MSOP (0.118", 3.00mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

●Pin descriptions
●Description of operations
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1)
2)
＊1
＊2
When the amplifier operates using single voltage power supply, the operating potential point is approximately 1/2 Vcc.
Therefore, a coupling capacitor is required to prevent DC output. For the video driver, the load resistance is 150 Ω (75 Ω
+ 75 Ω). Therefore, the coupling capacitor should be about 1000 µF when a low bandwidth for transmission is considered.
(See Figure 3.)
When the amplifier operates using a dual (±) power supply, the operating point can be set at GND level, and therefore,
there is no need for a coupling capacitor to prevent DC output.
Since a coupling capacitor is not needed, there is no sagging of low-frequency characteristics in output stage. (See Figure
4.)
As is shown in Figure 5, the charge pump consists of a pair of switches (SW1 and SW2) and a pair of capacitors (flying
capacitor and load capacitor), generating a negative voltage. When +3 V is applied to this IC, approximately -2.83 V of
negative voltage is obtained.
Principles of video driver with no output coupling capacitor
Generation of negative voltage by charge pump circuit
7
8
Amp (Single power supply)
The DC voltage in the figure is VCC = 3.0 V. These values are for reference only and are not guaranteed.
These values are for reference only and are not guaranteed.
NVCC
C2
VCC
1/2V
Fig.3
1000μF
CC
GND
VCC
VCC
VCC
GND
Bias
VCC
Output capacitor is required due to DC
voltage at output pin
75Ω
75Ω
NVCC
C2
5/16
(-2.75V)
(-2.75V)
-VCC
-VCC
↑↓
0V
Amp (Dual power supply)
C1
C2
Flying capacitor “-”pin
Load voltage pins (7 pins)
-VCC
VCC
Fig.4
NVC
75Ω
Output capacitor is not required since
DC voltage is not applied to output pin
75Ω
(8pin)
Technical Note
2009.03 - Rev.A
NVC
VCC
0V