Datasheet CAT4101 (ON Semiconductor) - 5
| 制造商 | ON Semiconductor |
| 描述 | 1 A Constant-Current LED Driver with PWM Dimming |
| 页数 / 页 | 10 / 5 — CAT4101. TYPICAL PERFORMANCE CHARACTERISTICS. Figure 9. RSET Pin Voltage … |
| 文件格式/大小 | PDF / 220 Kb |
| 文件语言 | 英语 |
CAT4101. TYPICAL PERFORMANCE CHARACTERISTICS. Figure 9. RSET Pin Voltage vs. VIN Voltage
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CAT4101 TYPICAL PERFORMANCE CHARACTERISTICS
(VIN = 5 V, VCC = 5 V, VF = 3.5 V, ILED = 1 A (1 LED), CIN = 1 mF, TAMB = 25°C unless otherwise specified.) 1.30 1.30 1.25 1.25 TAGE (V) TAGE (V) 1.20 1.20 RSET VOL 1.15 RSET VOL 1.15 1.10 1.10 3.0 3.5 4.0 4.5 5.0 5.5 −40 0 40 80 120 INPUT VOLTAGE (V) TEMPERATURE (°C)
Figure 9. RSET Pin Voltage vs. VIN Voltage Figure 10. RSET Pin Voltage vs. Temperature
1.2 1.0 0.8 0.6 0.4 LED CURRENT (A) 0.2 0 0 1 2 3 4 5 RSET (kW)
Figure 11. LED Current vs. RSET Resistor Figure 12. PWM 200 Hz, 1% Duty Cycle
100 1.4 1.2 10 −40°C 1.0 25°C 0.8 85°C 1 LED CURRENT (%) 100 Hz ENABLE THRESHOLD (V) 0.6 0.1 1 kHz 5 kHz 50 kHz 0.4 0.1 1 10 100 3.0 3.5 4.0 4.5 5.0 5.5 DUTY CYCLE (%) INPUT VOLTAGE (V)
Figure 13. LED Current vs. PWM Duty Cycle Figure 14. EN/PWM Threshold vs. VIN http://onsemi.com 5
(VIN = 5 V, VCC = 5 V, VF = 3.5 V, ILED = 1 A (1 LED), CIN = 1 mF, TAMB = 25°C unless otherwise specified.) 1.30 1.30 1.25 1.25 TAGE (V) TAGE (V) 1.20 1.20 RSET VOL 1.15 RSET VOL 1.15 1.10 1.10 3.0 3.5 4.0 4.5 5.0 5.5 −40 0 40 80 120 INPUT VOLTAGE (V) TEMPERATURE (°C)
Figure 9. RSET Pin Voltage vs. VIN Voltage Figure 10. RSET Pin Voltage vs. Temperature
1.2 1.0 0.8 0.6 0.4 LED CURRENT (A) 0.2 0 0 1 2 3 4 5 RSET (kW)
Figure 11. LED Current vs. RSET Resistor Figure 12. PWM 200 Hz, 1% Duty Cycle
100 1.4 1.2 10 −40°C 1.0 25°C 0.8 85°C 1 LED CURRENT (%) 100 Hz ENABLE THRESHOLD (V) 0.6 0.1 1 kHz 5 kHz 50 kHz 0.4 0.1 1 10 100 3.0 3.5 4.0 4.5 5.0 5.5 DUTY CYCLE (%) INPUT VOLTAGE (V)
Figure 13. LED Current vs. PWM Duty Cycle Figure 14. EN/PWM Threshold vs. VIN http://onsemi.com 5