Datasheet ISL97634 (Intersil) - 5
| Hersteller | Intersil |
| Beschreibung | White LED Driver with Wide PWM Dimming Range |
| Seiten / Seite | 12 / 5 — 1.0. 0.8. 4 LEDs, 10µH. 0.6. 3 LEDs, 10µH. ) A. 3 LEDs, 22µH. m 0.4. 7 … |
| Revision | 13-11-2017 |
| Dateiformat / Größe | PDF / 891 Kb |
| Dokumentensprache | Englisch |
1.0. 0.8. 4 LEDs, 10µH. 0.6. 3 LEDs, 10µH. ) A. 3 LEDs, 22µH. m 0.4. 7 LEDs, 10µH. I q. EFFICIENCY (%). 7 LEDs, 22µH. 0.2
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Textversion des Dokuments
ISL97634 Typical Performance Curves
90 1.0 85 0.8 80 4 LEDs, 10µH 0.6 75 3 LEDs, 10µH ) A 70 3 LEDs, 22µH m 0.4 7 LEDs, 10µH ( 65 I q EFFICIENCY (%) 7 LEDs, 22µH 0.2 60 ILED_peak = 25mA VIN = 4V 0.0 55 RSET = 4
fPWM = 1kHz 50 -0.2 0 20 40 60 80 100 0 1 2 3 4 5 6 PWM DUTY CYCLE (%) VIN (V)
FIGURE 2. EFFICIENCY vs PWM DUTY CYCLE FIGURE 3. QUIESCENT CURRENT vs VIN (PWM/EN = HI)
20.08 19.76 19.74 20.04 19.72 19.70 (mA) 20.00 (mA) I O I O 19.68 19.96 19.66 19.64 19.92 19.62 0 5 10 15 20 25 30 2.5 3.0 3.5 4.0 4.5 5.0 5.5 VOUT (V) VIN (V)
FIGURE 4. LOAD REGULATION (VIN = 4V) FIGURE 5. LINE REGULATION
100 7 LEDs 90 VOUT VIN = 4V 1kHz V 80 RSET = 4 IN = 4V ) V R1 = 4
70 L = 10µH (m LX L1 = 22µH GE 60 TA 50 OL V B 40 F PWM/EN 30 20kHz 20 10 32kHz ILED 0 0 20 40 60 80 100 120 DUTY CYCLE (%)
FIGURE 6. DIMMNG LINEARITY (FB VOLTAGE) vs DUTY CYCLE FIGURE 7. PWM DIMMING AT 1kHz, D = 1% FN6264 Rev 4.00 Page 5 of 12 August 27, 2013
90 1.0 85 0.8 80 4 LEDs, 10µH 0.6 75 3 LEDs, 10µH ) A 70 3 LEDs, 22µH m 0.4 7 LEDs, 10µH ( 65 I q EFFICIENCY (%) 7 LEDs, 22µH 0.2 60 ILED_peak = 25mA VIN = 4V 0.0 55 RSET = 4
fPWM = 1kHz 50 -0.2 0 20 40 60 80 100 0 1 2 3 4 5 6 PWM DUTY CYCLE (%) VIN (V)
FIGURE 2. EFFICIENCY vs PWM DUTY CYCLE FIGURE 3. QUIESCENT CURRENT vs VIN (PWM/EN = HI)
20.08 19.76 19.74 20.04 19.72 19.70 (mA) 20.00 (mA) I O I O 19.68 19.96 19.66 19.64 19.92 19.62 0 5 10 15 20 25 30 2.5 3.0 3.5 4.0 4.5 5.0 5.5 VOUT (V) VIN (V)
FIGURE 4. LOAD REGULATION (VIN = 4V) FIGURE 5. LINE REGULATION
100 7 LEDs 90 VOUT VIN = 4V 1kHz V 80 RSET = 4 IN = 4V ) V R1 = 4
70 L = 10µH (m LX L1 = 22µH GE 60 TA 50 OL V B 40 F PWM/EN 30 20kHz 20 10 32kHz ILED 0 0 20 40 60 80 100 120 DUTY CYCLE (%)
FIGURE 6. DIMMNG LINEARITY (FB VOLTAGE) vs DUTY CYCLE FIGURE 7. PWM DIMMING AT 1kHz, D = 1% FN6264 Rev 4.00 Page 5 of 12 August 27, 2013