BP5221A Rohm Semiconductor, BP5221A Datasheet - Page 5

• Manufacturer Part Number: BP5221A
• Description: CONVERTER DC/DC 5V OUT .5A 9-SIP
• Manufacturer: Rohm Semiconductor
• Series: BP5221r
• Type: Point of Load (POL) Non-Isolatedr

Specifications of BP5221A

• Output: 5V
• Number Of Outputs: 1
• Power (watts): 2W
• Mounting Type: Through Hole
• Voltage - Input: 8 ~ 38V
• Package / Case: 9-SIP Module (8 Leads)
• 1st Output: 5 VDC @ 500mA
• Size / Dimension: 1.10" L x 0.47" W x 0.77" H (28mm x 12mm x 19.5mm)
• Power (watts) - Rated: 2.5W
• Operating Temperature: -20°C ~ 70°C
• Efficiency: 84%
• Output Voltage: 5 V
• Output Current: 0.5 A
• Input Voltage: 8 V to 38 V
• Switching Frequency: 190 KHz
• Operating Temperature Range: - 20 C to + 70 C
• Mounting Style: Through Hole
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• 3rd Output: -
• 2nd Output: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

BP5220A/BP5221A/BP5222A
www.rohm.com
© 2010 ROHM Co., Ltd. All rights reserved.
Application Example 3 : Output voltage adjustment
VR value setting equations (The output voltage after adjustment is denoted by Vo.)
Application Example 4 : Slow start
The slow start circuit mitigates the pulse load on the internal switching transistor when input voltage is applied,
and increases the output voltage gradually by starting the switching operation slowly.
This application is useful for preventing malfunction of an external protection circuit due to rush current,
and can serve as a countermeasure against operation outside the safe operation range.
C1 is a slow-start capacitor for mitigating excessive rush current that flows into the module when the switch is
turned on.
Vi
(1) When reducing the output voltage
(1) When reducing the output voltage
(2) When increasing the output voltage
+
BP5220A / BP5221A
BP5222A
BP5220A / BP5221A
BP5222A
To maximize performance we recommended the output voltage be
adjusted within ±20% of the output voltage rating. When the output voltage is increased by 20%, for
instance, the minimum input voltage is also increased by 20%.
(Example : When the output voltage is changed from 5V to 6V in the BP5220A, the minimum input voltage
is charged from 8V to 9.6V)
Be sure to use
fuse for safety.
9
BP5220A / BP5221A / BP5222A
7
6
Fig.7
24V
Vi
5
4
3
+
100 F
VR
2
470k
1
9
Be sure to use
fuse for safety.
BP5220A / BP5221A / BP5222A
+
7
V
+
6
O
10 F
C1
Fig.9
5
5/7
2SC1740R
4
(2) When increasing the output voltage
3
Vi
100 F
2
1
+
+
470 F
Be sure to use
fuse for safety.
9
BP5220A / BP5221A / BP5222A
7
V
O
6
VR
Fig.8
5
4
3
2
1
2010.03 - Rev. B
+
Data Sheet
470 F
V
O