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Rohm Semiconductor Electronic Components Datasheet

BD550FHG Datasheet

AC/DC Controller

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Datasheet
AC/DC Drivers
AC/DC Controller IC
for non-dimmable LED lighting
BD550FHG
General Description
LED driver BD550FHG supports both isolated and
non-isolated devices. IC enables simple design of
low-power electrical converters.
With switching MOSFET and current detection resistor
as external devices, it enables more freedom in design.
Since the peak current control is utilized, peak current
is controlled in each cycle, application excels wide
bandwidth and transient response.
BD550FHG includes various protective functions such
as soft start function, burst function, per-cycle over
current limiter, VCC overvoltage protection and
overload protection.
An external latch pin (COMP pin) is provided, so that
latch stopping (OFF) can be set by external signals.
This function is available as overheating protection and
over output voltage protection.
The PWM switching frequency is fixed at 65 kHz.
A frequency hopping function is included which contributes
to low EMI.
Key Specifications
Power Supply Voltage range:
8.5V to 25.0V
Operating Current:
Normal: 0.60mA (Typ)
Burst: 0.40mA (Typ)
Oscillation Frequency:
65kHz (Typ)
Operating Temperature range:
-40°C to +110°C
Package
SSOP6
W(Typ) x D (Typ) x H (Max)
2.90mm x 2.80mm x1.25mm
Features
PWM frequency of 65kHz
PWM current mode method
Low circuit current when UVLO is ON
(12μA at VCC=12V)
Low circuit current without load
(Burst operation when load is light)
Built-in SW frequency hopping function
250nsec leading-edge blanking
VCC UVLO / OVP
Per-cycle over current protection circuit
Soft start
Output overload protection (Self-restart protection)
External latch function for COMP pin
(Over heating protection function)
Applications
Electrical machineries for LED lighting
Typical Application Circuit
Figure 1, Application Diagram (Non-Isolated Type)
Product structureSilicon monolithic integrated circuit
.www.rohm.com
© 2013 ROHM Co., Ltd. All rights reserved.
TSZ2211114001
This product is not designed protection against radioactive rays
1/17
TSZ02201-0F1F0C300020-1-2
2013.07.25 Rev.001


Rohm Semiconductor Electronic Components Datasheet

BD550FHG Datasheet

AC/DC Controller

No Preview Available !

BD550FHG
Pin ConfigurationSSOP6
Datasheet
(Unit:mm)
Figure 2, External Dimensions of SSOP6 Package
Pin Description
NO. Pin Name
1 GND
2 FB
3 COMP
4 CS
5 VCC
6 OUT
Table 1 I/O PIN Functions
I/O Function
I/O GND pin
I Feedback signal input pin
I Comparator input pin
I Primary current sensor pin
I Power supply input pin
O External MOS drive pin
ESD protection system
VCC
GND
-
○○
○○
○○
-
○○
I/O Equivalent Circuit
1
GND
GND
2 FB
VCC
FB
RFB
3 COMP
VCC
COMP
RCOMP
4
VCC
CS
CS
5 VCC
VCC
6
VCC
OUT
OUT
Figure 3, I/O Equivalent Circuit
www.rohm.com
© 2013 ROHM Co., Ltd. All rights reserved.
TSZ2211115001
2/17
TSZ02201-0F1F0C300020-1-2
2013.07.25 Rev.001


Part Number BD550FHG
Description AC/DC Controller
Maker ROHM
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BD550FHG Datasheet PDF






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