Microsoft Word - AP1515V02

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1 Document No. Rev.: V0.20 Page: 1 of 9 Revision History Rev. DRN # History Initiator Effective Date V01 V02 Initial document 黃宗文 Add second package description 葉宗榮 2014/05/ /09/08 Initiator: 雷晨妤 (DCC) Approvals: (IC) 侯智璋 Check by: 劉貴忠 (PM) (SYS) 黃宗文 * Signature on file in DCC*

2 Document No. Rev.: V0.20 Page: 2 of 9 AP1515 DC IRIS Driver IC ANAPEX TECHNOLOGY INC. 2F.-1, No. 5, Tai-Yuen 1st St., Jhubei City, Hsinchu 30265, Taiwan, R.O.C. Agent: Tel: Fax: Version: 0.10 May 15, 2014 This article is subject to change without notice.

3 Document No. Rev.: V0.20 Page: 3 of 9 FEATURES Brightness level setting 8-lead DFN8L (2*2*0.85mm) package Less external passive components PIN CONFIGURATION APPLICATIONS DC IRIS driver for IRIS control application with small package and less passive components. DESCRIPTION AP1515 is a DC IRIS driver IC designed for IRIS control of lens module. AP1515 functions as an analog control input controller for a one-channel, single-end IRIS driver. The maximum output current of the output pin of AP1515 is up to 80mA. The BRC brightness control pin is to set an expected brightness for AP1515 to control IRIS module and keep the proper brightness. The video signal is fed into video input pin for AP1515 to monitor the current brightness level of video. Pin # Mnemonic I/O Description 1 CAP I/O External capacitor for low-pass filter 2 VIN I Video input 3 BRC I Brightness control 4 GND - Ground 5 VDD - Power supply 6 DPN I DAMP- of DC IRIS 7 DPP O DAMP+ of DC IRIS 8 DRV O Driver output ORDERING INFORMATION MODEL PACKAGE AP1515 DFN8L-2*2*0.85mm

4 Document No. Rev.: V0.20 Page: 4 of 9 Absolute Maximum Ratings (unless otherwise specified, Temperature=25 ) Characteristic Symbol Rating Unit Supply Voltage VDD 5.5 V Input Voltage VIN VDD+0.4V V Operating Temperature Range TOPR -40~125 Storage Temperature Range TSTO -65~150 Electrical Characteristics (unless otherwise specified, Temperature=25 & VDD=5.0V) Characteristic Sym. Condition Limit Min. Typ. Max. Unit Supply Voltage VDD V Supply Current IDD VIN = BRC = 1.65V, No Load ma Driver output DRV Output Current IOUT ma Sink Current ISINK ma

5 Document No. Rev.: V0.20 Page: 5 of 9 FUNCTION DESCRIPTION Overview Figure 1 shows the typical application of AP1515 for a video signal input. An external capacitor C F is connected between CAP pin and DRV pin to perform a low pass filter for the output driver. The video signal is connected to video input pin VIN through a resistor R IN to detect the current brightness. The default brightness of IRIS module can be set by using an external variable resistor R B for the brightness control pin. If there is a difference between VIN and BRC, the error amplifier will drive IRIS module to keep a constant brightness. The maximum gain of the error amplifier is 10 and can be modified by the resistor R IN.The output voltage of DRV pin can be expressed as 1M V DRV = ( ) ( VBRC VVIDEO ) + V 100k + R IN BRC The input signal can be the DAC output of the image processor (DSP) with the built-in auto-iris control algorithms. The convergence time of the algorithm may not match with the time constant of AP1515. Change the capacitance of C F to get a suitable time constant to avoid oscillation. It is recommended to connect a variable resistor to the BRC pin to adjust the tolerance of the image sensor, IRIS module and other passive components. The resistors R BU and R BD are used to decrease the voltage range of the variable resistor R B. Figure 1. The application circuit example of video signal

6 Document No. Rev.: V0.20 Page: 6 of 9 Figure 2 shows the PWM control of AP1515 for the MCU application. The PWM outputs are fed into the BRC and VIN pins through the RC low pass filter. The actual value of R LP and C LP depends on the frequency of PWM pulse. The cut-off frequency of the low pass filter that is at least 10 times smaller than the frequency of PWM pulse is recommended. f C 1 = 2πR C LP LP Figure 2. The application circuit example of the PWM control

7 Document No. Rev.: V0.20 Page: 7 of 9 OUTLINE DIMENSION (DFN8L-2*2*0.85mm) AP1515 LOT_NO YYWW A e b D1 E E1 D A3 A1 DIMENSION (MM) SYMBOLS MIN NOM MAX A A A REF. --- b D D BSC --- E E BSC ---- e BSC --- L

8 Document No. Rev.: V0.20 Page: 8 of 9 OUTLINE DIMENSION (DFN8L-2*2*0.85mm, the second package type) DIMENSION (MM) SYMBOLS MIN NOM MAX A A A REF. --- b D D E E e BSC --- L

9 Document No. Rev.: V0.20 Page: 9 of 9 Tape and Reel Information Package Type Body Size (mm) Leads # Reel Q ty (7 Reel) Tape Width (mm) Tape Pitch (mm) Pin#1 Orientation DFN8L 2*2* Sprocket Hole Side - Left DIMENSION (MM) SYMBOLS MIN NOM MAX W A B K P P S S S R W

Pin Configurations Figure2. Pin Configuration of FS2012 (Top View) Table 1 Pin Description Pin Number Pin Name Description 1 GND 2 FB 3 SW Ground Pin.

Pin Configurations Figure2. Pin Configuration of FS2012 (Top View) Table 1 Pin Description Pin Number Pin Name Description 1 GND 2 FB 3 SW Ground Pin. Features Wide 3.6V to 32V Input Voltage Range Output Adjustable from 0.8V to 30V Maximum Duty Cycle 100% Minimum Drop Out 0.6V Fixed 300KHz Switching Frequency 12A Constant Output Current Capability Internal