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A6210 PDF даташит

Спецификация A6210 изготовлена ​​​​«Allegro MicroSystems» и имеет функцию, называемую «3A 2MHz Buck-Regulating LED Driver».

Детали детали

Номер произв A6210
Описание 3A 2MHz Buck-Regulating LED Driver
Производители Allegro MicroSystems
логотип Allegro MicroSystems логотип 

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A6210 Даташит, Описание, Даташиты
A6210
3 A, 2 MHz Buck-Regulating LED Driver
Features and Benefits
User-configurable on-time, achieving switching
frequencies up to 2.0 MHz
Brightness control through PWM of DIS pin
Minimal external components required
No output capacitor required
Wide input voltage range: 9 to 46 V
Low 0.18 V sense voltage for higher efficiency
Output Current: up to 3.0 A
Low standby current <100 μA
Thermal shutdown
Supplied in a thermally-enhanced 4 mm QFN package
Applications:
High brightness LEDs
LED driver modules, power supplies and lamps, such as
MR16 and MR11
Package 16-contact QFN (suffix EU):
4 mm × 4 mm × 0.75 mm
Description
The A6210 is a buck regulator that uses valley current-mode
control. This control scheme allows very short switch on-times
to be achieved, making it ideal for applications that require
high switching frequencies combined with high input voltages
and low output LED span voltages.
Low system cost is accomplished through high switching
frequencies of up to 2.0 MHz, allowing smaller and lower value
inductors and capacitors. In addition, few external components
are required through high levels of integration. Optimal drive
circuits minimize switching losses.
The switching frequency is maintained constant, as the on-time
is modulated by the input voltage. This feed-forward control
ensures excellent line correction. The on-time is set by an
external resistor pulled-up to the input supply.
Internal housekeeping and bootstrap supplies are provided
which require the addition of only one small ceramic capacitor.A
top-off charge pump ensures correct operation at light loads.
Internal diagnostics provide comprehensive protection against
input undervoltages and overtemperatures.
The device package is a 16-contact, 4 mm × 4 mm, 0.75 mm
nominal overall height QFN, with exposed pad for enhanced
thermal dissipation. It is lead (Pb) free, with 100% matte tin
leadframe plating.
6210-DS, Rev. 2
VIN
24 V
R1
150 kΩ
C1
1.0 μF
Typical Application
VIN BOOT
LX
TON A 6210
ISEN
PWM or Switch
DIS
SGND
NC GND
C2
22 nF
L1
68 μH
D1
R2
390 mΩ
LED1
LED2
LED3
LED span voltage = 10.5 V
Average LED current = 500 mA
Peak to peak current = 60 mA
Switching frequency = 1.4 MHz
Efficiency = 90.5%
Suggested Parts
Name Description
C1 1 μF, 25V, X5R or X7R ceramic, 1210
C2 22 nF, 50V, X5R or X7R ceramic, 0805
D1 1 A, 30 V, Schottky diode
L1 68 μH, 1 A inductor
R1 180 kΩ, 1%, 0805
R2 390 mΩ, 1%, 0805
Manufacturer - Part Number
Taiyo Yuden, TDK
Taiyo Yuden - NR 6045T 680M









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A6210 Даташит, Описание, Даташиты
A6210
3 A, 2 MHz Buck-Regulating LED Driver
Selection Guide
Part Number
A6210GEUTR-T
Packing
1500 pieces per reel
Package
16-contact 4 mm × 4 mm QFN with exposed thermal pad
Absolute Maximum Ratings (reference to GND)
Characteristic
Symbol
VIN Pin Supply Voltage
LX Pin Switching Node Voltage
ISEN Pin Current Sense Voltage
DIS Pin Disable Voltage
TON Pin On-Time Voltage
Operating Ambient Temperature
Maximum Junction Temperature
Storage Temperature
VIN
VLX
VISEN
VDIS
VTON
TA
TJ(max)
Tstg
Range G
Notes
Rating
–0.3 to 50
–1 to 50
–1.0 to 0.5
–0.3 to 7
–0.3 to 50
–40 to 105
150
–55 to 150
Units
V
V
V
V
V
ºC
ºC
ºC
Recommended Operating Conditions
Characteristic
Symbol
Supply Voltage
Switching Node
Switching Frequency Range
Operating Ambient Temperature
Junction Temperature
VIN
VLX
fSW
TA
TJ
Conditions
Continuous conduction mode
Min.
9
–0.7
0.1
–40
–40
Typ.
Max.
46
46
2.0
105
125
Units
V
V
MHz
ºC
ºC
Thermal Characteristics may require derating at maximum conditions, see application information
Characteristic
Symbol
Test Conditions*
Package Thermal Resistance,
Junction to Ambient
RθJA On 4-layer PCB based on JEDEC standard
Package Thermal Resistance,
Junction to Pad
RθJP On 4-layer PCB based on JEDEC standard
*Additional thermal information available on the Allegro website.
Value
36
2
Units
ºC/W
ºC/W
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
2









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A6210 Даташит, Описание, Даташиты
A6210
3 A, 2 MHz Buck-Regulating LED Driver
Functional Block Diagram
VIN 24 V
R1
180 kΩ
C1
1.0 μF
Sleep
Circuit
VIN
Linear
Regulator
TON
DIS
On
Timer
Off
Timer
Control
Logic
C2
22 nF
BOOT
Top-off VIN
Charge
Pump
LX
Driver
Blank
ISEN
Switch
Closed = On
VIN UVLO
Linear OK
TSD
Fault
Regulator
Comparator
+
Reg
Ref
SGND
L1
68 μH
LED1
D1
LED2
LED3
R2
390 mΩ
NC GND
Switching Frequency = 1.4 MHz
All capacitors are X5R or X7R ceramic
Resistor R2 should be surface mount, low inductance type, rated at 250 mW at 70°C
Pin-out Diagram
VIN
NC
TON
GND
1
2
3
4
PAD
12 LX
11 BOOT
10 DIS
9 SGND
(Top View)
Terminal List Table
Number
1
2, 7, 13, 14,
15, 16
3
4, 5, 6
8
Name
VIN Input supply
Function
NC No connection; tie to GND
TON
GND
ISEN
Terminal for on-time setting with external resistor
Ground terminal
Current sense input
9 SGND Current sense ground reference
10 DIS Disable/enable logic input; active high
11 BOOT Bootstrap supply node
12 LX Switch node
PAD
Exposed thermal pad; connect to ground plane
(GND) by through-hole vias
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
3










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