Datasheet LTC3783 (Analog Devices) - 8
| 制造商 | Analog Devices |
| 描述 | PWM LED Driver and Boost, Flyback and SEPIC Controller |
| 页数 / 页 | 24 / 8 — PIN FUNCTIONS ITH (Pin 15):. RUN (Pin 16):. Exposed Pad (Pin 17):. BLOCK … |
| 文件格式/大小 | PDF / 311 Kb |
| 文件语言 | 英语 |
PIN FUNCTIONS ITH (Pin 15):. RUN (Pin 16):. Exposed Pad (Pin 17):. BLOCK DIAGRAM
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文件文字版本
LTC3783
PIN FUNCTIONS ITH (Pin 15):
Error Amplifier Output/Compensation Pin. The RUN pin threshold is nominal y 1.248V and the comparator current comparator input threshold increases with this control has 100mV hysteresis for noise immunity. When the RUN voltage, which is the output of the gm type error amplifier. pin is grounded, the IC is shut down and the VIN supply Nominal voltage range for this pin is 0V to 1.40V. current is kept to a low value (20µA typ).
RUN (Pin 16):
The RUN pin provides the user with an ac-
Exposed Pad (Pin 17):
Ground Pin. Solder to PCB ground curate means for sensing the input voltage and program- for electrical contact and rated thermal performance. ming the start-up threshold for the converter. The falling
BLOCK DIAGRAM
VREF 4 SLOPE BIAS VREF COMP GND 17 FREQ 5 CLK V-TO-I OSC S SS_RESET 0.615V Q GATE LOGIC 9 SYNC R 6 1.9V – IVMODE TEMP OT + + SENSOR OV/FB OV I (165°C) LIM SENSE 3 EA VREF – ITRIP + 12 FBP 2 – FBN A – 1 VREF +– 1 S 0.2V + SLEEP OV/FB 14 – + 0 – 50mA SS 13 IMAX + – 0.15V ITH 15 V-TO-I PWMIN PWMOUT 7 8 EN INTVCC 10 LDO VREF RUN 2.23V + UV BIAS AND + 16 START-UP – – VREF VIN 11 3738 BD 3783fb 8 Document Outline Features Description Applications Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Pin Functions Block Diagram Operation Package Description Related Parts
PIN FUNCTIONS ITH (Pin 15):
Error Amplifier Output/Compensation Pin. The RUN pin threshold is nominal y 1.248V and the comparator current comparator input threshold increases with this control has 100mV hysteresis for noise immunity. When the RUN voltage, which is the output of the gm type error amplifier. pin is grounded, the IC is shut down and the VIN supply Nominal voltage range for this pin is 0V to 1.40V. current is kept to a low value (20µA typ).
RUN (Pin 16):
The RUN pin provides the user with an ac-
Exposed Pad (Pin 17):
Ground Pin. Solder to PCB ground curate means for sensing the input voltage and program- for electrical contact and rated thermal performance. ming the start-up threshold for the converter. The falling
BLOCK DIAGRAM
VREF 4 SLOPE BIAS VREF COMP GND 17 FREQ 5 CLK V-TO-I OSC S SS_RESET 0.615V Q GATE LOGIC 9 SYNC R 6 1.9V – IVMODE TEMP OT + + SENSOR OV/FB OV I (165°C) LIM SENSE 3 EA VREF – ITRIP + 12 FBP 2 – FBN A – 1 VREF +– 1 S 0.2V + SLEEP OV/FB 14 – + 0 – 50mA SS 13 IMAX + – 0.15V ITH 15 V-TO-I PWMIN PWMOUT 7 8 EN INTVCC 10 LDO VREF RUN 2.23V + UV BIAS AND + 16 START-UP – – VREF VIN 11 3738 BD 3783fb 8 Document Outline Features Description Applications Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Pin Functions Block Diagram Operation Package Description Related Parts