BD8153EFV-E2 Rohm Semiconductor, BD8153EFV-E2 Datasheet - Page 7

• Manufacturer Part Number: BD8153EFV-E2
• Description: IC POWER SUP VARI 4CH HTSSOP-B24
• Manufacturer: Rohm Semiconductor
• Series: -r

Specifications of BD8153EFV-E2

• Applications: TFT-LCD Monitors
• Current - Supply: 2mA
• Voltage - Supply: 2.1 V ~ 6 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: *
• Package / Case: *
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

●Block Function
●Starting sequence
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BD8153EFV
www.rohm.com
 Step-up Controller
 Charge Pump Control 1
 Charge Pump Control 2
 Gate Shading Controller
 Regulator Control
 DET 1 to DET 4
 Start-up Controller
 VREF
 TSD/UVLO
For malfunction prevention, starting logic control operates so that each output will rise in order of V
As shown below, detectors DET1 to DET3 detect that the output on the detection side has reached 90% (typ.) of the set voltage,
and starts the next block.
A controller circuit for DC/DC boosting.
The switching duty is controlled so that the feedback voltage FB1 is set to 1.24 V (typ.).
A soft start operates at the time of starting. Therefore, the switching duty is controlled by the SS pin voltage.
A controller circuit for the positive-side charge pump.
The switching amplitude is controlled so that the feedback voltage FB2 will be set to 1.24 V (typ.).
The start delay time can be set in the DLS terminal at the time of starting.
When the DLS voltage reaches 0.6 V (Typ.), switching waves will be output from the C1L and C2L pins.
A controller circuit for the negative-side charge pump.
The switching amplitude is controlled so that the feedback voltage FB2 will be set to 0.6 V (Typ.).
A controller circuit of gate shading.
The Vo2GS and GSOUT are in on/off control according to IG pin input.
A regulator controller circuit for V
The base pin current is controlled so that V
A detection circuit of each output voltage. This detected signal is used for the starting sequential circuit.
A control circuit for the starting sequence.
Controls to start in order of V
A block that generates internal reference voltage. 1.24V (Typ.) is output.
Thermal shutdown/Under-voltage lockout protection/circuit blocks.
The thermal shutdown circuit is shut down at an IC internal temperature of 175°C and reset at 160°C.
The under-voltage lockout protection circuit shuts down the IC when the VCC is 1.8 V (typ.) or below.
VCC
Reg
DET1
VDD
0
0
0
CTL1
CC
Step up
DC/DC
5V
VDD Vo1 Vo3 Vo2.
DD
voltage generation.
DET2
3.3V
Fig. 26 Starting Timing Chart
Starting sequence model
DD
Vo1
CTL2
voltage will be set to 3.3 V (typ.).
7/17
Negative
Charge
Pum p
DET3
Vo3
CTL3
Positive
Charge
Pum p
Vo2
Vo1
Vo3
Vcc
VDD
DET4
Vo2
CC
CLT4
VDD Vo1 Vo3 Vo2.
Technical Note
2009.07 - Rev.B