RT8300

RT8300 RICHTEK | Alldatasheet

Document overview

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• PDF pages: 11

Technical content

Features

zzzzz 4 Constant Current Output Channels zzzzz Wide Power Supply Voltage Range : 5V to 24V zzzzz Maximum Constant Current Output Voltage : 60V zzzzz Low Dropout Voltage : 600mV at 120mA Output Current zzzzz Constant Output Current Accuracy Between Channels : <±3% zzzzz Dynamic Headroom Control (DHC) Function zzzzz Constant Output Current Range : 5mA to 150mA zzzzz Support 400ns Narrow PWM Pulse zzzzz Fault Detection for OTP, LED Open/Short zzzzz RoHS Compliant and Halogen Free

Applications

RT8300GN : Product Number YMDNN : Date Code RT8300GN RichTek RT8300 GNYMDNN RT8300GS : Product Number YMDNN : Date Code RT8300GS RT8300 GSYMDNN RT8300 Package Type N : DIP-16 (BW) S : SOP-16 Lead Plating System G : Green (Halogen Free and Pb Free)

DS8300-00 January 2012www.richtek.com Copyright 2012 Richtek Technology Corporation. All rights reserved. is a registered trademark of Ri chtek Technology Corporation.© Typical Application Circuit Pin Configurations (TOP VIEW) DIP-16 (BW) FB PWMI VIN SLP GND LED2 LED1 NC FAULT ISET LED3 GND LED4 GND GND NC LED2 LED1 LED3 LED4 NC GND GND PWMI VIN FB ISET FAULT GNDSLP SOP-16 LED1 LED4VIN FAULT PWMI ISET SLP FB GND LED1 LED4VIN FAULT PWMI ISET SLP FB GND RT8300 RT8300 LED Driver [1] LED Driver [N] RISET1 RPH VH VIN PWMI FB (DHC) RSLP1 RISET2 RSLP2 VIN VLED VLED 60V (Max) Max 150mA Max 150mA Max 150mA Max 150mA CIN1 CFB 1nF CIN2

DS8300-00 January 2012 www.richtek.com Copyright 2012 Richtek Technology Corporation. All rights reserved. is a registered trademark of Ri chtek Technology Corporation.© Functional Pin Description Pin No. DIP-16 (BW) SOP-16 Pin Name Pin Function 3 3 PWMI Constant Current Output Channel Enable/Disable Input. High : Enable, Low : Disable 2 4 VIN Power Supply Input. 1 5 FB Feedback Control Voltage Output. 5 6 ISET Constant Current Set Pin. Connect to an external resistor to adjust constant current output. 6 7 FAULT Open Drain Output for Fault Detection. 7 8 SLP LED Short Protection Voltage Set Pin. 4, 11, 14 1, 2, 9, 16 GND Ground. The exposed pad must be soldered to a large PCB and connected to GND for maximum power dissipation. 10, 9, 12, 13 11 to 14 LED4 to LED1 Constant Current Sink Output. 8 10, 15 NC No Internal Connection. Function Block Diagram DHC Function IOUT Regulator Open/Short Detection Constant Current Control Circuit with PWM Control Thermal Protection VIN ISET PWMI FB FAULT SLP LED1 LED2 LED3 LED4 GND

DS8300-00 January 2012www.richtek.com Copyright 2012 Richtek Technology Corporation. All rights reserved. is a registered trademark of Ri chtek Technology Corporation.©

Electrical Characteristics

(VIN = 24V, TA = 25°C, unless otherwise specified) Recommended Operating Conditions (Note 3) Absolute Maximum Ratings (Note 1) z Power Dissipation, PD @ TA = 25°C z Package Thermal Resistance (Note 2) Parameter Symbol Test Conditions Min Typ Max Unit VIN Rising -- 3.6 -- Under Voltage Lockout Threshold VUVLO VIN Falling -- 3.1 -- V Output Voltage V LEDx LED1 to LED4, all CHs off -- -- 60 V LED Current Accuracy I LEDX2 V LEDX = 0.6V, RISET = 900Ω 116.4 120 123.6 mA LED Current Matching dI LEDX2 ILEDX = 120mA, VLEDX = 0.6V, Output Current vs. Output Voltage Regulation %/dVLEDX VLEDX within 0.5V and 3V, Output Current of SLP I SLP V SLP = 0.43V to 2V -- 16 -- μA VSLPH V LEDX = 14V -- 2 -- SLP Pin Voltage VSLPL V LEDX = 3.03V -- 0.43 -- V Open LED Protection (OLP) Voltage VOLP V LEDx -- 50 -- mV Logic-High V PWMIH T A = −40°C to 85°C 2 -- -- PWMI Input Voltage Logic-Low V PWMIL T A = −40°C to 85°C -- -- 0.8 VFBH I FBH = 50μA -- 3.3 -- Feedback Voltage VFBL I FBL = 1mA -- 0.2 -- V

DS8300-00 January 2012 www.richtek.com Copyright 2012 Richtek Technology Corporation. All rights reserved. is a registered trademark of Ri chtek Technology Corporation.© Parameter Symbol Test Conditions Min Typ Max Unit IFBH V FB = 3.3V -- 50 -- μA FB Pin Output Current IFBL V FB = 0.2V -- 1 -- mA Output Leakage Current I OH VLEDx = 50V, all CHs off, PWMI = Low -- --- 0.5 μA Thermal Protection Temperature TOTP Junction Temperature -- 140 -- °C Thermal Protection Temperature Hysteresis ΔTOTP Junction Temperature -- 50 -- °C Supply Current I DD(ON) R ISET = 3.6kΩ, PWMI = High -- 3 5 mA Shutdown Current I SHDN Shutdown -- 6 20 μA Low to High Transition tPLH 0.1 0.3 0.6 PWMI to LEDx Propagation Delay Time High to Low Transition tPHL 0.05 0.1 0.4 μs Shutdown Delay Time t SHDN -- 32 -- ms Power On Reset Time t RESET -- 256 -- μs Soft-Start Time t SS -- 128 -- ms Fault Blanking Time t FB PWM = 100% -- 32 -- ms PWMI High Blanking Time t RB -- 4 -- μs Fault Detection Time t F -- 2 -- μs Note 1. Stresses beyond those listed “Absolute Maximum Ratings ” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions may affect device reliability. Note 2. θ JA is measured at T A = 25 °C on a high effective thermal conductivity four-layer test board per JEDEC 51-7. θJC is measured at the exposed pad of the package. Note 3. The device is not guaranteed to function outside its operating conditions.

DS8300-00 January 2012www.richtek.com Copyright 2012 Richtek Technology Corporation. All rights reserved. is a registered trademark of Ri chtek Technology Corporation.© Low Dropout Voltage vs. LED Current 0.0 0.2 0.4 0.6 0.8 1.0 50 70 90 110 130 150 LED Current (mA) Low Dropout Voltage (V) Typical Operating Characteristics Supply Current vs. Input Voltage 1.0 1.5 2.0 2.5 3.0 3.5 4.0 5 9 13 17 21 25 Input Voltage (V) Supply Current (mA) PWMI = High, RISET = 3.6kΩ Shutdown Current vs. Input Voltage 5 9 13 17 21 25 Input Voltage (V) Shut down Current (μA) 1 LED Current vs. Input Voltage 100 106 112 118 124 130 5 9 13 17 21 25 Input Voltage (V) LED Current (mA) VLEDx = 0.6V, RISET = 900Ω LED1 LED2 LED3 LED4 Time (50ms/Div) Power Off Sequence VIN (20V/Div) ILED (1A/Div) PWMI (5V/Div) FB (5V/Div) VIN = 24V, PWM = 100% Time (50ms/Div) Power On Sequence VIN (20V/Div) ILED (1A/Div) PWMI (5V/Div) FB (5V/Div) VIN = 24V, PWM = 100% tSS = 128ms

W on a standard JEDEC 51-7 four-layer thermal test board. Figure 5. Derating Curves for the RT8300 Packages

DS8300-00 January 2012www.richtek.com Copyright 2012 Richtek Technology Corporation. All rights reserved. is a registered trademark of Ri chtek Technology Corporation.© 16-Lead DIP (BW) Plastic Package Dimensions In Millimeters Dimensions In Inches Symbol Min Max Min Max A 3.700 4.320 0.146 0.170 A1 0.381 0.710 0.015 0.028 A2 3.200 3.600 0.126 0.142 b 0.360 0.560 0.014 0.022 b1 1.143 1.778 0.045 0.070 b2 2.920 3.100 0.1 15 0.122 c 0.204 0.360 0.008 0.014 D 18.80 19.30 0.740 0.760 E 6.200 6.600 0.244 0.260 E1 7.320 7.920 0.288 0.312 E2 8.350 9.250 0.329 0.364 e 2.540 0.100 L 3.000 3.600 0.1 18 0.142 Outline Dimension

DS8300-00 January 2012 www.richtek.com Richtek Technology Corporation 5F, No. 20, Taiyuen Street, Chupei City Hsinchu, Taiwan, R.O.C. Tel: (8863)5526789 Richtek products are sold by description only. Richtek reserves the right to change the circuitry and/or specifications without notice at any time. Customers should obtain the latest relevant information and data sheets before placing orders and should verify that such information is current and complete. Richtek cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Richtek product. Information furnish ed by Richtek is believed to be accurate and reliable. However, no responsibility is assumed by Richtek or its subsidiaries for its use; nor for any infringeme nts of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of R ichtek or its subsidiaries. F B C I H D A J M Dimensions In Millimeters Dimensions In Inches Symbol Min Max Min Max A 9.804 10.008 0.386 0.394 B 3.810 3.988 0.150 0.157 C 1.346 1.753 0.053 0.069 D 0.330 0.508 0.013 0.020 F 1.194 1.346 0.047 0.053 H 0.178 0.254 0.007 0.010 I 0.102 0.254 0.004 0.010 J 5.791 6.198 0.228 0.244 M 0.406 1.270 0.016 0.050 16–Lead SOP Plastic Package