G5114

G5114 GMT | Alldatasheet

Document overview

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Technical content

Features

„ Driving Up to 8 LEDs „ Auto Trigger/Release OVP Function (G5114/G5118) „ Input Voltage Range: 1.7V ~ 6.5V „ Precise Dimming Control Using PWM Signal „ 50µA No Switching Current „ Internal 30V Switch With 0.8Ω Rds(on) „ Soft Start Function Included „ Up to 85% Efficiency

Applications

„ White LED Backlight Display for PDA „ Pocket PC „ Smart Phones „ Handheld Devices „ Cellular Phones General Description The G5114/G5116/G5118 are high efficiency boost converters with constant current output that drives up to 8 white LEDs. The continuous LED current is set with the FB pin regulated voltage across an external sense resistor (Rs) connected from that pin to ground. A dim- ming PWM waveform to SHDN pin controls LED av- erage current proportional to its duty makes the bright- ness of LEDs also proportional to the duty. Low FB regulation voltage and low switch turned on resistance result in high converting efficiency from wide battery voltage range to high LED series voltage. An over-voltage protection prevents device damage while LEDs is open. It is easy to release protection state by just put the load path closed.

Ordering Information

(Pb free) MARKING TEMP. RANGE PACKAGE G5114T1U G5114T1Uf 5114X -40°C ~ +85°C SOT-23-5 G5116T1U G5116T1Uf 5116X -40°C ~ +85°C SOT-23-5 G5118P8U G5118P8Uf G5118 -40°C ~ +85°C MSOP-8 Pin Configuration Typical Application Circuit VCC OVP SOT-23-5 G5114 1SW GND FB VCC SHDN SOT-23-5 G5116 1SW GND FB SW MSOP-8L G5118 1VCC PGND N.C.

7 AGND

1µF/ 35V VIN 2.7V to 4.2V VOUT OVPC1

8 LEDs

4.7µF/ 6.3V VCC OVP SOT-23-5 G5114 1SW GND FB VCC SHDN SOT-23-5 G5116 1SW GND FB SW MSOP-8L G5118 1VCC PGND N.C. 1µF/ 35V VIN 2.7V to 4.2V VOUT OVPC1 4.7µF/ 6.3V

Ver: 1.1 Sep 13, 2004 TEL: 886-3-5788833 http://www.gmt.com.tw G5114/G5116/G5118Global Mixed-mode Technology Inc. Absolute Maximum Ratings Stress beyond those listed under “Absolute Maximum Rating” may cause permanent damage to the device.

Electrical Characteristics

(VCC=V SHDN =3.6V, TA=25°C, unless specified) PARAMETER CONDITION MIN TYP MAX UNIT Input Voltage Range 1.7 --- 6.5 V G5114/G5118, Trigger 28 29 30 V OV Protection Threshold G5114/G5118, Release --- --- 25 V OV Pin Input Current G5114/G5118, V ovp = 28V --- 10 15 µA VFB = 0.3V --- 50 100 µA Quiescent Current V SHDN = 0V --- 2.4 3 µA FB Comparator Trip Point 242 250 258 mV Switch Off Time V FB = 0V --- 400 --- ns Switch RDS(ON) I SW = 150mA --- 0.8 1.2 Ω Switch Leakage Current Switch Off, V SW = 30V --- 0.1 5 µA Switch Current Limit 320 400 480 mA SHDN Pin Voltage High 0.9 --- --- V SHDN Pin Voltage Low --- --- 0.25 V Note.1:The G5114/G5116/G5118 are guaranteed to meet performance specifications from 0°C~85°C. Specifications over the -40°C~85°C operating temperature range are assured by design, characterization and correlation with statistical process controls. Block Diagram VREF BIAS SHUTDOWN LOGIC SW SHDNVCC FB ERROR COMP 0.25V en_sw GND PUMP CONTROL OC COMP DRIVER TOFF PULSE CONTROL VOUTVIN CTRL * OVP** LED Series VOUT * SHDN pin only availiable for G5116/G5118 ** OVP pin only availiable for G5114/G5118 VREF BIAS SHUTDOWN LOGIC SW SHDNVCC FB ERROR COMP 0.25V en_sw GND PUMP CONTROL OC COMP DRIVER TOFF PULSE CONTROL VOUTVIN CTRL * OVP** LED Series VOUT * SHDN pin only availiable for G5116/G5118 ** OVP pin only availiable for G5114/G5118

Ver: 1.1 Sep 13, 2004 TEL: 886-3-5788833 http://www.gmt.com.tw G5114/G5116/G5118Global Mixed-mode Technology Inc. Typical Performance Characteristics (VCC = +3.6V, V SHDN = +3.6V, L=10µH, TA=25°C, unless otherwise noted) 0.25 0.5 0.75 1.25 1.5 - 4 0 - 2 00 2 04 06 08 0 1 0 0 Temperature (°C) SW RDS_on (Ω) 100 200 300 400 500 600 - 4 0 - 2 00 2 04 06 08 0 1 0 0 Temperature (°C) Current Limit (mA) 0.25 0.5 0.75 1.25 1.5 Input Voltage (V) SW RDS_on (Ω) 100 200 300 400 500 Input Voltage (V) Current Limit (mA) Input Voltage (V) Efficiency (%) IO=20mA 6LEDs, CO=1µF Efficiency vs. Input Voltage SW RDS_on vs. Input Voltage SW RDS_on vs. Temperature Current Limit vs. TemperatureCurrent Limit vs. Input Voltage 0 5 10 15 20 25 Load Current (mA) Efficiency (%) VIN=4.2V 6LEDs, CO=1µF VIN-3.6V VIN=2.7V Efficiency vs. Output Current

Ver: 1.1 Sep 13, 2004 TEL: 886-3-5788833 http://www.gmt.com.tw G5114/G5116/G5118Global Mixed-mode Technology Inc. Typical Performance Characteristics (Continued) - 4 0 - 2 00 2 04 06 08 0 1 0 0 Temperature (°C) OVP Trigger Threshold (V) - 4 0 - 2 0 0 2 04 06 08 0 1 0 0 Temperature (°C) OVP Release Threshold (V) Input Voltage (V) OVP Trigger Threshold (V) 22.5 23.5 Input Voltage (V) OVP Release Threshold (V) Input Voltage (V) LED Current (mA) CO=1µF CO=0.1µF6LEDs 0 1 02 03 04 05 06 07 08 09 0 1 0 0 Duty Cycle (%) LED Current (mA) CO=0.1µF CO=1µF 6LEDs OVP Trigger Threshold vs. Input Voltage OVP Trigger Threshold vs. Temperature OVP Release Threshold vs. Input Voltage OVP Release Threshold vs. Temperature LED Current vs. Input Voltage LED Current vs. Duty Cycle

Ver: 1.1 Sep 13, 2004 TEL: 886-3-5788833 http://www.gmt.com.tw G5114/G5116/G5118Global Mixed-mode Technology Inc. Typical Performance Characteristics (Continued) PWM Dimming OVP Waveform 0 5 10 15 20 25 Load Current (mA) Efficiency (%) 8LEDs, CO=1µF VIN=4.2V VIN=3.6VVIN=3.0V Efficiency vs. Output Current G5118 Inrush Current Waveform

G5114/G5116/G5118Global Mixed-mode Technology Inc. 4 4 OVP Over Voltage Protection Sense Pin. by controlling the inrush current. determined by sense resistor Rs. other important inductor parameter is the DC resistance. Table 1. Recommended Inductors

G5114/G5116/G5118Global Mixed-mode Technology Inc. Table 2. Recommended Output Capacitors cient for most applications. Table 3. Recommended Input Capacitors speed, are best match for the G5114/G5116/G5118. Table 4. Recommended Diodes work should be routed away from the inductor.

Ver: 1.1 Sep 13, 2004 TEL: 886-3-5788833 http://www.gmt.com.tw G5114/G5116/G5118Global Mixed-mode Technology Inc.

Package Information

Note: 1. Package body sizes exclude mold flash protrusions or gate burrs 2. Tolerance ±0.1000 mm (4mil) unless otherwise specified 3. Coplanarity: 0.1000mm 4. Dimension L is measured in gage plane DIMENSIONS IN MILLIMETER SYMBOL MIN NOM MAX A 1.00 1.10 1.30 A1 0.00 ----- 0.10 A2 0.70 0.80 0.90 b 0.35 0.40 0.50 C 0.10 0.15 0.25 D 2.70 2.90 3.10 E 1.40 1.60 1.80 H 2.60 2.80 3.00 θ1 1º 5º 9º E e D H L C b A E e D H L C b A

Ver: 1.1 Sep 13, 2004 TEL: 886-3-5788833 http://www.gmt.com.tw G5114/G5116/G5118Global Mixed-mode Technology Inc. Note: 1. Package body sizes exclude mold flash and gate burrs 2. Dimension L is measured in gage plane 3. Tolerance 0.10mm unless otherwise specified 4. Controlling dimension is millimeter converted inch dimensions are not necessarily exact. 5. Followed from JEDEC MO-137 Taping Specification PACKAGE Q’TY/BY REEL SOT-23-5 3,000 ea MSOP-8 2,500 ea GMT Inc. does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and GMT Inc. reserves the right at any time without notice to change said circuitry and specifications. D E1 E 12° (4X) A2 A e b y C L θ D E1 E 12° (4X) A2 A e b y C L θ Feed Direction Typical MSOP Package Orientation Feed Direction Feed Direction Typical MSOP Package Orientation Feed Direction Typical MSOP Package Orientation Feed Direction