Datasheet MAX1573 (Analog Devices) - 4
| Fabricante | Analog Devices |
| Descripción | White LED 1x/1.5x Charge Pump in UCSP and Thin QFN |
| Páginas / Página | 9 / 4 — White LED 1x/1.5x Charge Pump in UCSP and Thin QFN. Typical Operating … |
| Formato / tamaño de archivo | PDF / 269 Kb |
| Idioma del documento | Inglés |
White LED 1x/1.5x Charge Pump in UCSP and Thin QFN. Typical Operating Characteristics (continued)
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White LED 1x/1.5x Charge Pump in UCSP and Thin QFN Typical Operating Characteristics (continued)
(VIN = 3.6V, EN1 = EN2 = IN, CIN = C1 = C2 = COUT = 1µF, RSET = 7.50kΩ, TA = +25°C, unless otherwise noted.)
STARTUP AND SHUTDOWN RESPONSE DIMMING RESPONSE
MAX1573 toc10 MAX1573 toc11 5V/ VEN_ V 2V/ ENI1
MAX1573
div div I 50mA/ IN div 2V/ VOUT IOUT 50mA/ div LED_ = 4 ✕ 17mA div EN1 = EN2 EN2 = IN 500μs/div 5μs/div
Pin Description PIN NAME FUNCTION TQFN UCSP
1 B2 C2P Transfer Capacitor 2 Positive Connection. See the Component Selection section for capacitor value. Output. Bypass to GND with a 1µF ceramic capacitor. Connect to the anodes of all the LEDs. OUT is 2 A2 OUT high impedance during shutdown. 3 A3 EN1 Enable, Dimming Control Input 1. EN1 and EN2 control shutdown and the LED current. See Table 1. 4 — N.C. No Connection 5 A4 EN2 Enable, Dimming Control Input 2. EN1 and EN2 control shutdown and the LED current. See Table 1. Bias-Current Set Input. Connect a resistor from SET to GND to set the LED bias current (ISET). ISET = 6 B4 SET 600mV/RSET. LED2 Cathode Connection and Charge-Pump Feedback. The charge pump regulates to the lowest 7 C4 LED2 voltage on any of the LED_ inputs. Connect LED2 to the cathode of one output LED. Connect LED2 to IN if this LED is not populated. LED1 Cathode Connection and Charge-Pump Feedback. The charge pump regulates to the lowest 8 D4 LED1 voltage on any of the LED_ inputs. Connect LED1 to the cathode of one output LED. Connect LED1 to IN if this LED is not populated. LED4 Cathode Connection and Charge-Pump Feedback. The charge pump regulates to the lowest 9 C3 LED4 voltage on any of the LED_ inputs. Connect LED4 to the cathode of one output LED. Connect LED4 to IN if this LED is not populated. LED3 Cathode Connection and Charge-Pump Feedback. The charge pump regulates to the lowest 10 D3 LED3 voltage on any of the LED_ inputs. Connect LED3 to the cathode of one output LED. Connect LED3 to IN if this LED is not populated. 11 D2 GND Ground 12 — N.C. No Connection
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(VIN = 3.6V, EN1 = EN2 = IN, CIN = C1 = C2 = COUT = 1µF, RSET = 7.50kΩ, TA = +25°C, unless otherwise noted.)
STARTUP AND SHUTDOWN RESPONSE DIMMING RESPONSE
MAX1573 toc10 MAX1573 toc11 5V/ VEN_ V 2V/ ENI1
MAX1573
div div I 50mA/ IN div 2V/ VOUT IOUT 50mA/ div LED_ = 4 ✕ 17mA div EN1 = EN2 EN2 = IN 500μs/div 5μs/div
Pin Description PIN NAME FUNCTION TQFN UCSP
1 B2 C2P Transfer Capacitor 2 Positive Connection. See the Component Selection section for capacitor value. Output. Bypass to GND with a 1µF ceramic capacitor. Connect to the anodes of all the LEDs. OUT is 2 A2 OUT high impedance during shutdown. 3 A3 EN1 Enable, Dimming Control Input 1. EN1 and EN2 control shutdown and the LED current. See Table 1. 4 — N.C. No Connection 5 A4 EN2 Enable, Dimming Control Input 2. EN1 and EN2 control shutdown and the LED current. See Table 1. Bias-Current Set Input. Connect a resistor from SET to GND to set the LED bias current (ISET). ISET = 6 B4 SET 600mV/RSET. LED2 Cathode Connection and Charge-Pump Feedback. The charge pump regulates to the lowest 7 C4 LED2 voltage on any of the LED_ inputs. Connect LED2 to the cathode of one output LED. Connect LED2 to IN if this LED is not populated. LED1 Cathode Connection and Charge-Pump Feedback. The charge pump regulates to the lowest 8 D4 LED1 voltage on any of the LED_ inputs. Connect LED1 to the cathode of one output LED. Connect LED1 to IN if this LED is not populated. LED4 Cathode Connection and Charge-Pump Feedback. The charge pump regulates to the lowest 9 C3 LED4 voltage on any of the LED_ inputs. Connect LED4 to the cathode of one output LED. Connect LED4 to IN if this LED is not populated. LED3 Cathode Connection and Charge-Pump Feedback. The charge pump regulates to the lowest 10 D3 LED3 voltage on any of the LED_ inputs. Connect LED3 to the cathode of one output LED. Connect LED3 to IN if this LED is not populated. 11 D2 GND Ground 12 — N.C. No Connection
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