zxld1360 Zetex Semiconductors plc., zxld1360 Datasheet
zxld1360
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zxld1360 Summary of contents
Page 1
... Depending upon supply voltage and external components, this can provide watts of output power. The ZXLD1360 includes the output switch and a high-side output current sensing circuit, which uses an external resistor to set the nominal average output current. ...
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... V = 1.25V ADJ SENSE Measured on ADJ pin with pin floating REF (b) V falling ADJ V rising ADJ = Driving the ADJ pin above V ADJ ADJ(nom) REF 2 ZXLD1360 =25°C unless otherwise stated) amb Min. Typ. Max 5.65 5. 1.8 5.0 95 100 105 SENSE IN ±15 -0.1 1. ...
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... ADJ pin has risen above 0.3V ADJ pin floating (0.093 ) OUT Driving 1 LED LX switch ‘ON’ LX switch ‘OFF’ LX switch 'ON' LXmax 3 ZXLD1360 =25°C unless otherwise stated) Min. Typ. Max. Unit 135 250 REF 13.5 +100mV 0.5 1.0 0.01 REF 100:1 ...
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... OUT from this pin nom = 0.1/R OUT S = 0.1 with ADJ pin open-circuit) SMIN Reel width (inches ZXLD1360 = V = 1.25V giving nominal ADJ REF = 0.1/RS) < 2.5V) to adjust output current from OUT nom for f < 500Hz to define nominal average output IN Quantity Device mark per reel ...
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... Block diagram 4.7 F Voltage regulator Adj 3 R4 200K D1 1.25V Gnd 2 Issue 1 - March 2007 © Zetex Semiconductors plc 2007 0. 20K 1.35V 5 ZXLD1360 SENSE Low voltage detector www.zetex.com ...
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... The supply referred voltage V SENSE S pin with respect The average output current I IN according to nom) between ADJ and the internal reference voltage. 6 ZXLD1360 ), forms a self zero and there the comparator output switches ADJ . The current IN , the comparator output switches ADJ ...
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... LX voltage SENSE voltage Coil current 0V Comparator V input voltage ADJ 5V Comparator output 0V Issue 1 - March 2007 © Zetex Semiconductors plc 2007 Toff Ton 115mV 85mV 0.15V ADJ Figure 1 - Operating waveforms 7 ZXLD1360 100mV V SENSE- V SENSE+ I +15% OUTnom I OUTnom I -15% OUTnom 0.15V ADJ www.zetex.com ...
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... Actual operating waveforms [V Normal operation. Output current (Ch1) and LX voltage (Ch2) Actual operating waveforms [V Normal operation. Output current (Ch1) and LX voltage (Ch2) Issue 1 - March 2007 © Zetex Semiconductors plc 2007 =15V, R =0.1 , L=33µ =30V, R =0.1 , L=33µ ZXLD1360 www.zetex.com ...
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... Led 50 3 Led 40 7 Led ZXLD1360 Supply Voltage V (V) IN Duty Cycle % vs Input Voltage Supply Voltage V (V) IN www.zetex.com 1 Led 3 Led 7 Led 30 1 Led 3 Led ...
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... LED 7 LED 8 LED 10 ZXLD1360 ZXLD1360 Output Current L=33μ Supply Voltage V (V) IN 1LED 2LED 3LED 4LED 5LED 6LED 7LED ZXLD1360 Duty Cycle L=33μ Supply Voltage V (V) ...
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... LED 7 LED 8 LED 11 ZXLD1360 ZXLD1360 Output Current L=47μ Supply VoltageV (V) IN 1LED 2LED 3LED 4LED 5LED 6LED 7LED ZXLD1360 Duty Cycle L=47μ Supply Voltage V (V) ...
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... LED 7 LED 8 LED 12 ZXLD1360 ZXLD1360 Output Current L=100μ Supply Voltage V (V) IN 1LED 2LED 3LED 4LED 5LED 6LED 7LED ZXLD1360 Duty Cycle L=100μ Supply Voltage V ...
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... LED Current vs Vadj 1 2 ADJ Pin Voltage (V) R=100mΩ R=150mΩ R=330mΩ 13 ZXLD1360 Vref vs Supply Voltage Supply Voltage V (V) IN Shutdown Current vs Supply Voltage Supply Voltage V ( www.zetex.com 30 35 ...
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... Typical operating conditions ZXLD1360 Response Time vs Temperature Typical minimum LX 'on' and 'off' time 350 300 250 200 150 100 50 0 -55 -35 - Ambient Temperature (°C) Min LX on Min LX off Vadj vs Temperature L = 470uH 0.33 Ohms 1.24 1.235 1.23 1.225 1.22 1.215 1.21 -55 -35 - Ambient Temperature ( ...
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... ADJ pin is driven from an external voltage. (See S ADJ ZXLD1360 GND [for 0.3< V <2.5V] S ADJ = V ADJ OUTdc ±25% for voltages below V 15 ZXLD1360 and is given by: REF ), as shown, to adjust the output current . S . When driving the ADJ pin above REF exceeding 1A maximum. and 20k REF www.zetex.com (=1.25V). ±25% for ...
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... See the section on PWM dimming for more details of the various modes of control using high frequency and low frequency PWM signals. Issue 1 - March 2007 © Zetex Semiconductors plc 2007 ZXLD1360 GND ZXLD1360 GND ZXLD1360 GND 16 ZXLD1360 www.zetex.com ...
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... =15V, R =0.1 , L=33µH, 0nF on ADJ ZXLD1360 will increase REF www.zetex.com ...
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... Capacitors with Y5V dielectric are not suitable for decoupling in this application and should NOT be used. A suitable Murata capacitor would be GRM42-2X7R475K-50. The following web sites are useful when finding alternatives: www.murata.com www.t-yuden.com www.kemet.com www.avxcorp.com Issue 1 - March 2007 © Zetex Semiconductors plc 2007 =15V, R =0.1 , L=33µH ,100nF on ADJ ZXLD1360 www.zetex.com ...
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... Inductor selection Recommended inductor values for the ZXLD1360 are in the range 100 H. Higher values of inductance are recommended at higher supply voltages in order to minimize errors due to switching delays, which result in increased ripple and lower efficiency. Higher values of inductance also result in a smaller change in output current over the supply voltage range ...
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... LX output silicon diode is used, care should be taken to ensure that the total voltage appearing on the LX pin including supply ripple, does not exceed the specified maximum value. Issue 1 - March 2007 © Zetex Semiconductors plc 2007 =0 =0. =3.6V LED 20 ZXLD1360 =1A and V =0.49V avg D www.zetex.com ...
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... The graph below gives details for power derating. This assumes the device to be mounted on a 25mm with 1oz copper standing in still air. Issue 1 - March 2007 © Zetex Semiconductors plc 2007 LED Cled ZXLD1360 ). SD 2 PCB www.zetex.com ...
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... The LEDs are usually mounted remotely from the device so, for this reason, the temperature coefficients of the internal circuits for the ZXLD1360 have been optimized to minimize the change in output current when no compensation is employed. If output current compensation is required possible to use an external temperature sensing network - normally using Negative Temperature Coefficient (NTC) thermistors and/or diodes, mounted very close to the LED(s) ...
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... ADJ pin is recommended to minimize changes in output current under these conditions. Evaluation PCB The ZXLD1360EV1 evaluation boards are available on request. These boards contain a Lumileds K2 or multiple Ostar LEW type LEDs to allow quick testing of the 1360 device. Additional terminals allow for interfacing to customers own LED products. ...
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... To minimize this error, the PWM frequency should be as low as possible consistent with avoiding flicker in the LED(s). Issue 1 - March 2007 © Zetex Semiconductors plc 2007 Ton Toff >0.01] 24 ZXLD1360 200mV 0.1/Rs IOUTavg www.zetex.com ...
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... This mode will give minimum output ripple and reduced radiated emission, but with a reduced dimming range (approx.5:1). The restricted dimming range is a result of the device being turned off when the dc component on the filter output falls below 200mV. Issue 1 - March 2007 © Zetex Semiconductors plc 2007 Ton >0.16] PWM 25 ZXLD1360 Toff www.zetex.com I OUTnom ...
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... Issue 1 - March 2007 © Zetex Semiconductors plc 2007 Intentionally left blank 26 ZXLD1360 www.zetex.com ...
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... Issue 1 - March 2007 © Zetex Semiconductors plc 2007 Millimeters Max. - 1.00 0.10 0.90 0.45 0.20 2.90 BSC 2.80 BSC 1.60 BSC 0.95 BSC 1.90 BSC 0.50 0.25 BSC 12° 27 ZXLD1360 Inches Min. Max. - 0.0393 0.0003 0.0039 0.0330 0.0354 0.0118 0.0177 0.0047 0.0078 0.114 BSC 0.110 BSC 0.062 BSC 0.0374 BSC 0.0748 BSC 0.0118 ...
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... Zetex Semiconductors plc 3701-04 Metroplaza Tower 1 Zetex Technology Park, Chadderton Hing Fong Road, Kwai Fong Oldham, OL9 9LL Hong Kong United Kingdom Telephone: (852) 26100 611 Telephone: (44) 161 622 4444 Fax: (852) 24250 494 Fax: (44) 161 622 4446 asia.sales@zetex.com hq@zetex.com 28 ZXLD1360 www.zetex.com ...