BD8622EFV-E2 Rohm Semiconductor, BD8622EFV-E2 Datasheet - Page 10

• Manufacturer Part Number: BD8622EFV-E2
• Description: IC, POWER SUPPLY HTSSOP-B20
• Manufacturer: Rohm Semiconductor
• Series: -r

Specifications of BD8622EFV-E2

• Primary Input Voltage: 5.5V
• No. Of Outputs: 1
• Output Current: 3A
• Voltage Regulator Case Style: HTSSOP
• No. Of Pins: 20
• Operating Temperature Range: -10°C To +85°C
• Svhc: No SVHC (18-Jun-2010)
• Package /: RoHS Compliant
• Applications: Converter, Flat Screen TV
• Voltage - Input: 2.7 V ~ 5.5 V
• Number Of Outputs: 1
• Voltage - Output: -
• Operating Temperature: -10°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 20-VSSOP (0.173", 4.40mm Width)
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

● Protection function
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BD8622EFV
www.rohm.com
Protection circuit is effective for destruction prevention due to accident so that avoid using under continuous protection
operation.
Low voltage protection function (LVP)
The voltage of the terminal FB (2 pins) is compared with internal reference voltage VREF.
If FB terminal voltage falls below V
the state is fixed. In that case , PDET (3pin) output changes to L.
Over voltage protection function(OVP)
The voltage of the terminal FB is compared with internal reference voltage VREF.
If FB terminal voltage is over Vovp (=VREF +60mV) and the state is continues for 500usec, output changes to low voltage
and the state is fixed.
＊ Low voltage protection function is available when SS terminal voltage becomes more than
1.4V (typ) in the transition to ON control (during soft start).
＊ Over voltage protection function is available when SS terminal voltage becomes more than
1.4V (typ) in the transition to ON control (during soft start).
>V
<V
EN
terminal
>V
<V
ENH
ENL
ENH
ENL
EN
terminal
FB terminal
SS terminal
>1.4V(typ)
<1.4V(typ)
-
voltage
>1.4V(typ)
<1.4V(typ)
-
terminal
Protection
PDET
SS
terminal
LVP
(= VREF -60mV) and the state continues for 500us, output changes to low voltage and
HIGH
LOW
V
OFF
ON
Table 2 output overvoltage protection function
Fig.8 Output voltage error detection range
Table 1 output low voltage protection function
FB
FB terminal
>V
<V
-
-
<V
>V
-
-
0
OVP
OVP
LVP
LVP
LVP
FB terminal
10/15
Over voltage
protection function
Effective
Invalidity
Invalidity
Effective
Invalidity
Invalidity
Low voltage
protection function
OVP
Over voltage
protection operation
ON
OFF
OFF
OFF
ON
OFF
OFF
OFF
VREF＋60ｍV
LVP
VREF-60ｍV
Low voltage
protection
operation
VREF
Technical Note
2009.05 - Rev.A