Datenblatt-pdf.com


KB4313 Schematic ( PDF Datasheet ) - Kingbor Technology

Teilenummer KB4313
Beschreibung Constant Current 12 Watt Boost White-LED Driver
Hersteller Kingbor Technology
Logo Kingbor Technology Logo 




Gesamt 10 Seiten
KB4313 Datasheet, Funktion
Kingbor Technology Co.,Ltd
TEL:(86)0755-26508846 FAX:(86)0755-26509052
KB4313
High Efficiency, Constant Current
12 Watt Boost White-LED Driver
FEATURES
•Operating Voltage:2.4V~6.5V
•High Operating Frequency: 1.5MHz
•High Efficiency: Up to 95%
•High Output Voltage: Up to 34V(max)
•High Output Power: Up to 12W(Vin=12V)
•Shutdown Current <1PA
•16V Output Over-voltage protection (min)
•Digital Dimming Control.
•Built-in Cycle-by Cycle Current-limiting.
•Built-in Soft-Start Function.
•0.2V Low Reference Voltage(3%)
•Tiny SOT23-6 Package
APPLICATIONS
• LED Module
• LED Backlight for LCD Display(7~21)
• Constant Current Source!
• USB host
DESCRIPTION
The KB4313 step-up converter drives white LEDs
with a constant current to provide backlight in cell
phones, PDAs, and other hand-held devices. It
features allowing series connection of the white
LEDs so that the LED currents are identical for
uniform brightness. An enable input can be pulsed
repeatedly to adjust LED’s brightness. The fast 1.5
MHz current-mode PWM control allows for smaller
capacitor and inductor. Fault condition protection
uses cycle-by-cycle current limiting to sense
maximum inductor current, thermal protection and
over-voltage protection. Also included soft-start
eliminates inrush current during start-up. The 0.2V
low reference voltage minimized the power loss
across the current-setting resistor.
The KB4313 is available in SOT23-6 packages /
SIMPLIFIED BLOC DIAGRAM
VIN
EN
FB
OVP
ON/OFF
Control
Logic / PWM
Dimming
Control
CTL
VREF(200mV)
+
-
VREF
0.2V
VBG
1.23V
Soft-Start
Control Logic
16V-20V(6.5uA)
VBG
+
-
Overvoltage
Protection
Current Limit
1.4A
+
-
N
CTL
GND
LX
REV: 2.0
1






KB4313 Datasheet, Funktion
Kingbor Technology Co.,Ltd
TEL:(86)0755-26508846 FAX:(86)0755-26509052
KB4313
High Efficiency, Constant Current
12 Watt Boost White-LED Driver
APPLICATION CIRCUIT
VIN
3.4V to 6.0V
+
2.2uF
ON
OFF
PWM
Signal
10uH
1N5817
22uF
VIN LX
OVP
KB4313
EN FB
GND
up to 60 LEDs
LED1 ΞΞ LED60
X15
ΞΞ
1.2 TBD
Figure 1c. kB4313 for 8Panel LED Back light unit .
VIN
2.4V to 6.0V
+
BAT54S
1uF
5.1V
-10V 50mA
+
Tan CAP
+15V 200mA
750K
REV: 2.0
EN
Signal
10K
Figure 1d. kB4313 Typical Application Circuit with +15V -10V Output .
6

6 Page







SeitenGesamt 10 Seiten
PDF Download[ KB4313 Schematic.PDF ]

Link teilen




Besondere Datenblatt

TeilenummerBeschreibungHersteller
KB4312Constant Current Switching RegulatorKingbor Technology
Kingbor Technology
KB4313Constant Current 12 Watt Boost White-LED DriverKingbor Technology
Kingbor Technology
KB4314Constant Current 1 Watt Boost White-LED DriverKingbor Technology
Kingbor Technology
KB4317Constant Current 2 Watt Boost White-LED DriverKingbor Technology
Kingbor Technology

TeilenummerBeschreibungHersteller
CD40175BC

Hex D-Type Flip-Flop / Quad D-Type Flip-Flop.

Fairchild Semiconductor
Fairchild Semiconductor
KTD1146

EPITAXIAL PLANAR NPN TRANSISTOR.

KEC
KEC


www.Datenblatt-PDF.com       |      2020       |      Kontakt     |      Suche