AS3691 4 Precision 400mA Current Sources for RGB and Single Color LEDs General Description The AS3691 (AS3691A and AS3691B) features four high precision current sinks to drive up to four LED strings. Each of the current sinks can sustain up to 15V and drive up to 400mA. Every channel can be controlled independently by PWM inputs. To ensure best efficiency AS3691 is able to regulate any external LED power supply (DC-DC converter) to its perfect needs (patented feedback function). The full scale current is set by external resistor. Ordering Information and Content Guide appear at end of datasheet. Key Benefits & Features The benefits and features of the AS3691 4 Precision 400mA Current Sources for RGB and Single Color LEDs, are listed below: Figure 1: Added Value of Using AS3691 Benefits Features • Fully flexible current outputs / no SW effort • 4 × up to 0.4A constant current outputs • Programmable with external resistors • 4 independent PWM inputs • Perfect color uniformity • Absolute current accuracy ±0.5% • Unique DC-DC feedback function • ’Automatic Supply Regulation’ (1) to reduce power dissipation • Maximum number of LEDs per channel • Very wide output voltage current source voltage compliance • Down to 0.41V • Up to 15V (2) • On-chip safety features • Integrated overtemperature protection • Easy integration due to several package types including thermal enhanced eP-TSSOP • Package options: • QFN24 (4 × 4mm) • eP-TSSOP Note(s): 1. ams system patent 2. 15V is sufficient for most applications as the AS3691 does not switch off the LED current completely ams Datasheet [v2-07] 2016-Jan-21 Page 1 Document Feedback AS3691 − General Description Applications • General Lighting • Backlighting • RGB Backlighting for LCD TV/Monitors with White Color Balancing Application Diagrams Figure 2: Application Diagram of AS3691 for Single Color Lighting VDD VDD Csup 100nF Rvdd Cvdd 100nF UV UV VREG UV1 CURR1 AS3691 UV2 CURR2 Vc UV3 CURR3 Vc UV4 CURR4 Vc Vc D1 Ref T1 I1 Overtemp Pad VSS T2 R1 ON1 RFB1 T3 I2 R2 RES1 ON2 Ri1 RFB2 T4 I3 R3 RES2 ON3 Ri2 RFB3 I4 R4 RES3 ON4 Ri3 RFB4 RES4 Ri4 VSS VSS PWM PWM Page 2 Document Feedback ams Datasheet [v2-07] 2016-Jan-21 AS3691 − General Description Figure 3: Application Diagram of AS3691 for RGB Lighting VDDG VDDG VDDB VDDB VDDR VDDR Rvdd Cvdd 100nF UVG UVG UVB UVB UVR UVR UV1 VREG CURR1 AS3691 UV2 UV3 CURR2 Vc CURR3 Vc UV4 CURR4 Vc Vc D1 Ref T1 I1 Overtemp Pad R1 VSS ON1 RFB1 T3 I2 R2 RES1 ON2 Ri1 VSS T2 RFB2 T4 I3 R3 RES2 ON3 Ri2 RFB3 I4 R4 RES3 ON4 Ri3 RFB4 RES4 Ri4 VSS PWMG PWMG PWMB PWMB PWMR PWMR ams Datasheet [v2-07] 2016-Jan-21 Page 3 Document Feedback AS3691 − Pin Assignments Pin Assignments Figure 4: Pin Usage VREG UV1 CURR1 AS3691 UV2 CURR2 Vc UV3 CURR3 Vc UV4 CURR4 Vc Vc D1 Ref T1 I1 Overtemp Pad T2 I2 R1 VSS ON1 RFB1 T3 R2 RES1 ON2 T4 I3 R3 RES2 ON3 RFB2 RFB3 I4 R4 RES3 ON4 RFB4 RES4 Pin Descriptions Figure 5: Pin Descriptions Pin Number QFN Package Pin Number eP-TSSOP Package Pin Name Type 1 10 CURR1 AI/O 2 11 RFB1 AI Connect to current set resistor R1 directly at resistor itself 3 12 nc nc Leave open 4 13 RFB4 AI Connect to current set resistor R4 directly at resistor itself 5 14 CURR4 AI/O Current source 4 output 6 15 RES4 AI/O Connect to current set resistor R4 Page 4 Document Feedback Description Current source 1 output ams Datasheet [v2-07] 2016-Jan-21 AS3691 − Pin Assignments Pin Number QFN Package Pin Number eP-TSSOP Package Pin Name Type Description 7 16 ON4 DI Current source CURR4 control; internal pullup resistor to VREG (can be left open, if CURR4 is always switched ON) High … 100% current Low … 5% current 8 17 UV4 AO Automatic supply regulation for CURR4; if not used, leave open 9 18 TEST AI Digital test input; Leave open or connect to VSS; internal pulldown to VSS 10 19 UV3 AO Automatic supply regulation for CURR3; if not used, leave open Current source CURR3 control; internal pullup resistor to VREG (can be left open, if CURR3 is always switched ON) High … 100% current Low … 5% current 11 20 ON3 DI 12 21 RES3 AI/O Connect to current set resistor R3 13 22 CURR3 AI/O Current source 3 output 14 23 RFB3 AI Connect to current set resistor R3 directly at resistor itself 15 24 VREG S Shunt regulator supply; connect to Rvdd and Cvdd 16 1 RFB2 AI Connect to current set resistor R2 directly at resistor itself 17 2 CURR2 AI/O Current source 2 output 18 3 RES2 AI/O Connect to current set resistor R2 19 4 ON2 DI Current source CURR2 control; internal pullup resistor to VREG (can be left open, if CURR2 is always switched ON) High … 100% current Low … 5% current 20 5 UV2 AO Automatic supply regulation for CURR2; if not used, leave open 21 6 VSS S 22 7 UV1 AO ams Datasheet [v2-07] 2016-Jan-21 VSS supply connection Automatic supply regulation for CURR1; if not used, leave open Page 5 Document Feedback AS3691 − Pin Assignments Pin Number QFN Package Pin Number eP-TSSOP Package Pin Name Type Description Current source CURR1 control; internal pullup resistor to VREG (can be left open, if CURR1 is always switched ON) High … 100% current Low … 5% current 23 8 ON1 DI 24 9 RES1 AI/O Pad Pad VSS S Connect to current set resistor R1 VSS supply connection; add as many vias to ground plane as possible The abbreviations used in Figure 5 are explained below: AI/O: Analog Input/Output AI: Analog Input AO: Analog Output DI: Digital Input S: Supply Page 6 Document Feedback ams Datasheet [v2-07] 2016-Jan-21 AS3691 − Absolute Maximum Ratings Absolute Maximum Ratings Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only. Functional operation of the device at these or any other conditions beyond those indicated under Electrical Characteristics is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Figure 6: Absolute Maximum Ratings Symbol Parameter Min Max Unit Note VDDMAX Supply for LEDs -0.3 > 17 V See notes (1) VINVREG VREG Supply Voltage -0.3 7.0 V Applicable for pin VREG VIN5V 5V Pins -0.3 VREG + 0.3V V Applicable for 5V pins (2) VIN15V 15V Pins -0.3 17 V Applicable for CURR1, CURR2, CURR3 and CURR4 IIN Input Pin Current -25 +25 mA TSTRG Storage Temperature Range -55 125 °C RHNC Relative Humidity (non-condensing) 5 85 % MSL Moisture Sensitivity Level 3 ESDHBM Electrostatic Discharge ±2000 PT Total Power Dissipation PDERATE TBODY At 25°C, Norm: JEDEC 17 Maximum floor lifetime of 168h V Norm: MIL 883 E Method 3015 2.0 W At 50°C, no airflow for QFN24 on two layer FR4-Cu PCB (3) PT Derating Factor 23 mW/°C Body Temperature during Soldering 260 °C See notes (3) According to IPC/JEDEC J-STD- 020C Note(s): 1. As the AS3691 is not directly connected to this supply. Only the parameters V INVREG , VIN5V and VIN15V have to be guaranteed by the application. 2. All pins except CURR1, CURR2, CURR3 and CURR4. 3. Depending on actual PCB layout and especially number of vias below the exposed pad – see Layout Recommendations; can be improved e.g. with Al-PCB or airflow. ams Datasheet [v2-07] 2016-Jan-21 Page 7 Document Feedback AS3691 − Electrical Characteristics Electrical Characteristics Figure 7: Operating Conditions Symbol Parameter VDD Main Supply VDDTOL Main Supply Voltage Tolerance -20 VREGINT Supply (shunt regulated by AS3691) 5.0 4.5 VREGEXT IVREG Supply Current TAMB Ambient Temperature Min Typ Max Unit Note Not Limited V Supply is not directly connected to the AS3691 – see Shunt Regulator +20 % Applies only for supply VREG is connected via Rvdd 5.2 5.4 V If internally (shunt-)regulated by D1 4.75 5.0 V If externally supplied 2.5 mA 85 °C -20 25 Typ Excluding current through shunt regulator (D1) – see Shunt Regulator Figure 8: Analog Electrical Characteristics Symbol Parameter Min VCURR Current Source CURR1 to CURR4 Voltage Compliance ICURR Current Source Range Max Unit Note 0.9 15.0 V at 400mA; total power dissipation limit PT must not be exceeded 0.41 15.0 V at 100 mA 10 400 -0.5 ICURR, TOL (1) +0.5 mA % @25ºC TJUNCTION, excluding variation of external resistors; V(CURRx) ≤ 4.0V % -20°C to 100°C (2) TJUNCTION, -20°C to 85°C TAMB, excluding variation of external resistors; V(CURRx) ≤ 4.0V See Automatic Supply Regulation Current Source Tolerance -1.5 +1.5 VC Automatic Supply Regulation Compare Voltage 1.0 V VC,GAIN Automatic Supply Regulation Gain 2.0 mA/V Page 8 Document Feedback ONx = high ICURRx = 250mV / Rix (x = 1 to 4) Voltage to current ratio; output current range typ 0 to 200μA ams Datasheet [v2-07] 2016-Jan-21 AS3691 − Electrical Characteristics Symbol Parameter I1-4 Parallel Current TOVTEMP Min Overtemperature Limit Typ Max Unit 1.0 mA V(CURRx) ≤ 15V 0.1 mA V(CURRx) ≤ 5.0V °C Maximum junction temperature 140 Note Note(s): 1. To obtain higher currents connect more than one current source in parallel. 2. Accuracy at 100°C guaranteed by design and verified by laboratory characterization. Figure 9: Digital Input Pin Characteristics for Pins ON1, ON2, ON3 and ON4 Symbol Parameter Min VIH High Level Input Voltage VIL Low Level Input Voltage RPU Pullup Resistor fON ams Datasheet [v2-07] 2016-Jan-21 Input Frequency Range Typ Max Unit 2.3 VREG V 0.0 0.9 V 70 0 20 Note kΩ Internal pullup resistor R1 to R4 to VREG kHz This defines the actual input frequency seen on the input ON1 to ON4; the basic frequency to generate the PWM signal is not limited by this parameter Page 9 Document Feedback AS3691 − Typical Operating Characteristics Typical Operating Characteristics Figure 10: Output Current vs. Voltage on Current Source – High Current Range 0,45 0,4 I(CURR1) [A] 0,35 0,3 0,25 0,2 0,15 0,1 0,05 0 0 5 10 15 VCURR1 [V] Figure 11: Output Current vs. Voltage on Current Source – Low Current Range 12 I(CURR1) [mA] 10 8 6 4 2 0 0 2 4 6 8 10 12 14 VCURR1 [V] Page 10 Document Feedback ams Datasheet [v2-07] 2016-Jan-21 AS3691 − Typical Operating Characteristics Figure 12: Internal Voltage Reference vs. Temperature, V(CURR1) = 2.0V, Ri1 = 250Ω 253 V(RES1) [mV] 252 251 250 249 248 247 0 20 40 60 80 100 120 140 Temperature [C] (EQ1) V ( RES1 ) ICURR 1 = ----------------------Ri 1 Figure 13: Output Current vs. Temperature, V(CURR1) = 2.0V, Ri1 = 2.5Ω (temperature coefficient of Ri1 = -200ppm/°C) I(CURR1) [mA] 102 101 100 99 98 0 10 20 30 40 50 60 70 Temperature [C] ams Datasheet [v2-07] 2016-Jan-21 Page 11 Document Feedback AS3691 − Typical Operating Characteristics Figure 14: Cross Coupling of PWM on CURR1 to CURR2; I(CURR1) = 100mA to 4mA, I(CURR2) = 100mA; AS3691A Figure 15: PWM Performance of Current Source CURR1, I(CURR1) Changed Between 400mA (ON1=1) and 20mA (ON1=0); AS3691A Page 12 Document Feedback ams Datasheet [v2-07] 2016-Jan-21 AS3691 − Typical Operating Characteristics Figure 16: Shunt Regulator Voltage VREG vs. Supply VDD with Rfb=1kΩ 6 VREG [V] 5 4 3 2 1 0 0 5 10 15 20 25 30 35 40 VDD [V] Figure 17: Automatic Supply Regulation Dynamic Performance Using DC-DC Converter in Regulation Loop Automatic Supply Regulation Dynamic Performance Using DC-DC Converter in Regulation Loop: R1 = 47kΩ, R2 = 10kΩ, R3 = 5kΩ, R4 = 500Ω, C1 = 1uF, I(CURR1) = 400mA/20mA (Ri1=0.625Ω) 3 OSRAM Golden Dragon in series as load between CURR1 and VDD Input signal on pin ON1: PWM signal with f=10kHz, 80% duty cycle ams Datasheet [v2-07] 2016-Jan-21 Page 13 Document Feedback AS3691 − Typical Operating Characteristics Figure 18: Parallel Current I1 to I4 (for measurement of I1 remove current set resistor R1) 0,7 I(CURR1) [mA] 0,6 0,5 0,4 0,3 0,2 0,1 0 0 5 10 15 VCURR1 [V] Page 14 Document Feedback ams Datasheet [v2-07] 2016-Jan-21 AS3691 − Detailed Description The AS3691 includes four high precision current sources (sinks). Each current source is set by an external resistor. For internal power supply an internal shunt regulator is used. Optionally an additional 5V device can be supplied as well with this shunt regulator. Detailed Description The current sources are individually controlled by four ON inputs. If the inputs ON are high or left open, then the current is set as follows: (EQ2) 250mV ICURR 1 – 4 = ----------------Ri 1 – 4 Setting the input ON to low the current is (EQ3) 10.0mV ICURR 1 – 4 = ------------------- for part numbers starting with AS3691A Ri 1 – 4 The current is not zero to avoid high voltage jumps on the LEDs and supplies and therefore reduce EMI. (EQ4) 0.0mV ICURR 1 – 4 = ---------------- + I 1 – 4 = I 1 – 4 for part numbers starting with Ri 1 – 4 AS3691B; I1-4 is the parallel current (see Figure 17). Shunt Regulator The supply of the AS3691 is generated from the high voltage supply. To obtain a 5V regulated supply, a series resistor Rvdd is used together with an internal zener diode (shunt regulator principle). An external capacitor Cvdd is used to filter the supply on the pin VREG. The external resistor Rvdd has to be chosen according to the following formula: (EQ5) VDD MIN – VVREGINT MAX Rvdd = ------------------------------------------------------------------------IVREG MAX VDD MIN is the minimum voltage of the supply, where Rvdd is connected. This ensures enough supply current (IVREG MAX) for the AS3691 under minimum supply voltage VDD MIN. If a stable 5V supply within the operating conditions limits of VREG EXT is already existing in the system it is possible to supply the AS3691 directly. In this case remove the resistor Rvdd and connected this supply directly to VREG. Overtemperature Protection If the junction temperature inside the AS3691 rises above TOVTEMP, the current sources are switched OFF. ams Datasheet [v2-07] 2016-Jan-21 Page 15 Document Feedback AS3691 − Detailed Description Automatic Supply Regulation The purpose of the automatic supply regulation is to minimize the voltage supply to reduce the voltage across the current sources of the AS3691 (CURR1-CURR4 to VSS) and therefore reduce the power dissipation of the AS3691 and the complete system. The AS3691 automatically controls the minimum required supply voltage for the different led strings to support very power efficient systems for lighting using the following circuit (any off-the-shelf DC-DC converter or ldo with adjustable output voltage can be used): Figure 19: Automatic Supply Regulation Circuit From main supply VDDx DCDC Converter for VDD R1 Voltage Feedback Vfb input for DCDC R2 R3 R4 Csup 100nF UVx C1 UV1 CURR1 UV2 CURR2 Feedback resistor divider (part of DCDC converter circuit) Vc Vc AS3691 The function of this circuit is as follows: All channels, which are connected to the supply VDDx should have their respective UV pin connected together to UVx (see Figure 19 and Typical Application Schematic). If any of these current sources has a too low voltage, it gradually pulls the wire UVx low. (The analog gain between the current source CURRx and output UVx is defined by the parameter V C,GAIN.) Therefore the feedback pin Vfb of the DC-DC converter is pulled low and the DC-DC converter compensates this by increasing the voltage on VDDx to obtain the same feedback voltage as before. To stabilize this regulation loop, the low pass filter build by C1 and R4 is used (this should be the dominant pole for the regulation loop). Page 16 Document Feedback ams Datasheet [v2-07] 2016-Jan-21 AS3691 − Detailed Description The minimum output voltage VDDx min can be set accurately by the resistors R1 and R2. The maximum output voltage VDDx max is set by R1, R2, R3 and R4 (Vref is the internal voltage reference of the DC-DC converter; usually Vref = Vfb): (EQ6) R1 + R2 VDDx MIN = Vref ⋅ -----------------R2 (EQ7) R 1 + R 2 || ( R 3 + R 4 ) VDDx MAX = Vref ⋅ -----------------------------------------------R 2 || ( R 3 + R 4 ) Therefore even if a led string is broken (then UVx is forced to 0V) or some LEDs are shorted, the supply always stays within the limits VDDx MIN and VDDx MAX. ams Datasheet [v2-07] 2016-Jan-21 Page 17 Document Feedback AS3691 − Application Information Application Information Typical Application Schematic For RGB LEDs (and a white color balancing circuit) use the following application schematic including automatic supply regulation (feedback paths UVR, UVG, UVB): Figure 20: Typical AS3691 System for RGB (Back-Lighting); Several AS3691 Can Be Cascaded Main supply DCDC Converter for VDDR VDDR Voltage Feedback input for DCDC UVR Feedback resistor divider (part of DCDC converter circuit) DCDC Converter for VDDG VDDG Voltage Feedback input for DCDC UVG Feedback resistor divider (part of DCDC converter circuit) DCDC Converter for VDDB VDDB Voltage Feedback input for DCDC UVB Feedback resistor divider (part of DCDC converter circuit) VDDG VDDB VDDR ... ... UVG UVB UVR Vc ... Vc Vc Vc Vc Vc Vc Vc ... D1 D1 D1 Overtemp Overtemp Overtemp AS3691 AS3691 AS3691 VSS PWMG PWMB PWMR 5V Supply 5V powered system (optional) PWMG PWMB PWMR Page 18 Document Feedback ams Datasheet [v2-07] 2016-Jan-21 AS3691 − Application Information A typical AS3691 for single color LEDs can be done as follows using automatic supply regulation (feedback path UV): Figure 21: Typical AS3691 System for Single Color LEDs and Supply Regulation Loop; Several AS3691 Can Be Cascaded VDD Main supply Csup 100nF DCDC Converter for VDD ... ... Voltage Feedback input for DCDC UV Vc ... 5V powered system (optional) Vc Vc Vc ... D1 D1 Overtemp Overtemp AS3691 AS3691 VSS PWM (optional) PWM Note(s): Csup (100nF) is only required, if there are long wires (>0.3m) between the DC-DC converter and the AS3691. The wire length between the Csup capacitor and the CURRx pin on AS3691 should not exceed 0.3m. If this cannot be guaranteed, add additional capacitors of 100nF to the pins CURRx. ams Datasheet [v2-07] 2016-Jan-21 Page 19 Document Feedback AS3691 − Application Information Design Example Assume a single color LEDs application (4 times 3 LEDs in series, each 100mA with Uf ranging from Uf min = 3.2V to Uf max = 3.8V) with a fixed supply. First choose the external current set resistor with the following formula: (EQ8) 250mV Ri 1 – 4 = ---------------------------ICURR 1 – 4 So for a current of 100mA, use a resistor of 2.5Ω; 1/8W rated resistors are suitable (even up to 400mA). Then calculate the required voltage of the power supply. The minimum voltage on the current sink for guaranteed operation is 0.41V (V CURR @100mA) and the maximum forward voltage of the LEDs is assumed to be Uf max = 3.8V. Therefore 3 * 3.8V + 0.41V = 11.81V. As this is the required minimum voltage of the power supply, add all the tolerances on top. Assumed ±10% supply tolerance results in a power supply with nominal 13V (to have at least 11.81V in worst case). Using the following formula to calculate the external shunt resistor: (EQ9) VDD MIN – VREGINT MAX VDD MIN – 5.4V Rvdd = ----------------------------------------------------------------- = ---------------------------------------IVREG MAX 2.5mA VDD MIN is the minimum voltage of the power supply, where Rvdd is connected obtains 2564Ω. The nearest lower(!) available value is 2.4kΩ. For Cvdd use: (EQ10) Cvdd = 100nF Csup (100nF) is only required, if there are long connections between the DC-DC converter and the AS3691 (>0.3m). The wire length between the Csup capacitor and the CURRx pin on AS3691 should not exceed 0.3m. If this cannot be guaranteed, add additional capacitors of 100nF to the pins CURRx. Then calculate the maximum power dissipation inside the AS3691. The worst case is maximum voltage supply (13V + 10%) together with LEDs with minimum forward voltage Uf min : For these conditions the maximum voltage on any current source (CURR1 to CURR4) is: (EQ11) VCURR MAX = ( 1 + VDD TOL )VDD – nU fmin Not using automatic supply regulation In our example 14.3V – 9.6V = 4.7V. The maximum power dissipation inside the AS3691 is now (assuming 4 identical strings): (EQ12) P MAX = 4VCURRMAX ICURR In our example 1.88W. As Page 20 Document Feedback ams Datasheet [v2-07] 2016-Jan-21 AS3691 − Application Information (EQ13) PT – P MAX T MAX = --------------------------- + 50°C P DERATE Note(s): For PT and PDERATE see Absolute Maximum Ratings. • The system can be operated safely up to an ambient temperature of 55°C assuming worst case power supplies and worst case LEDs. • If the internal junction temperature of the AS3691 rises too high, the AS3691 will switch OFF the current sources for protection (it will never damage the AS3691). Using Automatic Supply Regulation For the identical system using the automatic supply regulation, the supply is regulated to minimize the power dissipation of the system. Therefore the tolerance of the VDD supply and also the variation in forward voltages of the LEDs can be ignored (only the difference in one lot of LEDs is still important, as the four strings are connected in parallel to the power supply). Assume a difference of ΔUf = 0.2V of forward voltage of the LEDs in one lot, then calculate the maximum voltage on the current source of the AS3691 (CURR1 to CURR4) with (EQ14) VCURR MAX = nΔU f + V C Using automatic supply regulation ΔUf variation of LED forward voltage in one lot (for one application) V C is internal set voltage (1.0V) to be 1.6V. Using the identical formulas as above, P MAX now is 0.64W and T MAX is 110°C. Therefore using automatic supply regulation, the ambient temperature can be up to 110°C under identical conditions. ams Datasheet [v2-07] 2016-Jan-21 Page 21 Document Feedback AS3691 − Application Information Layout Recommendations See ams ‘AN3691_TECH_Module Description’1 as a layout example for the AS3691. Layout Checklist 1. Use the bottom layer as ground plane and minimize the number and the length of connections within this layer. 2. Do as many vias as possible on the exposed pad (for thermal performance) to the ground plane. 3. Connect RFBx and RESx together at the current set resistor Rix (see above recommended layout). 4. The ground connections of the current set resistors should be as close to the AS3691 as possible. 5. The ground connection of the capacitor Cvdd should be as close as possible to the AS3691. 6. Minimize Area build by ‘Csup VSS connection – Csup Supply Connection – LEDs – CURRx – Csup VSS connection’ (to minimize inductance in this path). 1. Please contact ams for more information. Page 22 Document Feedback ams Datasheet [v2-07] 2016-Jan-21 AS3691 − Package Drawings & Markings Package Drawings & Markings QFN Package Figure 22: QFN 24 – 4 × 4mm Package Drawings RoHS Green Note(s): 1. Dimensioning and tolerancing conform to ASME Y14. 5M-1994. 2. All dimensions are in millimeters. Angles are in degrees. 3. Dimension b applies to metallized terminal and is measured between 0.25mm and 0.30mm from terminal tip. Dimension L1 represents terminal full back from package edge up to 0.15mm is acceptable. 4. Coplanarity applies to the exposed heat slug as well as the terminal. 5. Radius on terminal is optional. 6. N is the total number of terminals. ams Datasheet [v2-07] 2016-Jan-21 Page 23 Document Feedback AS3691 − Package Drawings & Mark ings Figure 23: QFN Marking Diagram AS3691B YYWWXZZ @ Figure 24: QFN Package Code YY WW X ZZ @ Manufacturing year Manufacturing week Plant’s identifier Letters of free choice Sublot Identifier Page 24 Document Feedback ams Datasheet [v2-07] 2016-Jan-21 AS3691 − Package Drawings & Markings eP-TSSOP Package Figure 25: eP-TSSOP Package Drawings RoHS Green Note(s): 1. Dimensioning and tolerancing conform to ASME Y14. 5M-1994. 2. All dimensions are in millimeters. Angles are in degrees. 3. N is the total number of terminals. ams Datasheet [v2-07] 2016-Jan-21 Page 25 Document Feedback AS3691 − Package Drawings & Mark ings Figure 26: eP-TSSOP Marking AS3691B @ YYWWMZZ Figure 27: eP-TSSOP Package Code YY WW M ZZ @ Manufacturing year Manufacturing week Plant’s identifier Letters of free choice Sublot Identifier Page 26 Document Feedback ams Datasheet [v2-07] 2016-Jan-21 AS3691 − Ordering & Contact Information Ordering & Contact Information Figure 28: Ordering Information Ordering Code Marking Package Delivery Form Delivery Quantity AS3691A-ZQFT AS3691A QFN24 Trays in Dry Pack 4900 pcs/tray AS3691B-ZQFT AS3691B QFN24 Trays in Dry Pack 4900 pcs/tray AS3691B-ZQFP AS3691B QFN24 Tape and Reel in Dry Pack 6000 pcs/reel AS3691B-ZTSP AS3691B eP-TSSOP24 Tape and Reel in Dry Pack 4500 pcs/reel Description: AS3691V-ZPPD V … AS3691 version, either A or B AS3691A: 10mV on VRESx (x = 1 to 4) if ONx = 0 (see Detailed Description) AS3691B: 0mV on VRESx (x = 1 to 4) if ONx = 0 (see Detailed Description) Z … Temperature range -20°C to 85°C PP … Package; QF for QFN, TS for enhanced Power TSSOP D … Delivery form; P for Tape & Reel in Dry Pack, T for Trays in Dry Pack Buy our products or get free samples online at: www.ams.com/ICdirect Technical Support is available at: www.ams.com/Technical-Support Provide feedback about this document at: www.ams.com/Document-Feedback For further information and requests, e-mail us at: [email protected] For sales offices, distributors and representatives, please visit: www.ams.com/contact Headquarters ams AG Tobelbaderstrasse 30 8141 Unterpremstaetten Austria, Europe Tel: +43 (0) 3136 500 0 Website: www.ams.com ams Datasheet [v2-07] 2016-Jan-21 Page 27 Document Feedback AS3691 − RoHS Compliant & ams Green Statement RoHS Compliant & ams Green Statement RoHS: The term RoHS compliant means that ams AG products fully comply with current RoHS directives. Our semiconductor products do not contain any chemicals for all 6 substance categories, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, RoHS compliant products are suitable for use in specified lead-free processes. ams Green (RoHS compliant and no Sb/Br): ams Green defines that in addition to RoHS compliance, our products are free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weight in homogeneous material). Important Information: The information provided in this statement represents ams AG knowledge and belief as of the date that it is provided. ams AG bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. ams AG has taken and continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals. ams AG and ams AG suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release. Page 28 Document Feedback ams Datasheet [v2-07] 2016-Jan-21 AS3691 − Copyrights & Disclaimer Copyrights & Disclaimer Copyright ams AG, Tobelbader Strasse 30, 8141 Unterpremstaetten, Austria-Europe. Trademarks Registered. All rights reserved. The material herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the copyright owner. Devices sold by ams AG are covered by the warranty and patent indemnification provisions appearing in its General Terms of Trade. ams AG makes no warranty, express, statutory, implied, or by description regarding the information set forth herein. ams AG reserves the right to change specifications and prices at any time and without notice. Therefore, prior to designing this product into a system, it is necessary to check with ams AG for current information. This product is intended for use in commercial applications. Applications requiring extended temperature range, unusual environmental requirements, or high reliability applications, such as military, medical life-support or life-sustaining equipment are specifically not recommended without additional processing by ams AG for each application. This product is provided by ams AG “AS IS” and any express or implied warranties, including, but not limited to the implied warranties of merchantability and fitness for a particular purpose are disclaimed. ams AG shall not be liable to recipient or any third party for any damages, including but not limited to personal injury, property damage, loss of profits, loss of use, interruption of business or indirect, special, incidental or consequential damages, of any kind, in connection with or arising out of the furnishing, performance or use of the technical data herein. No obligation or liability to recipient or any third party shall arise or flow out of ams AG rendering of technical or other services. ams Datasheet [v2-07] 2016-Jan-21 Page 29 Document Feedback AS3691 − Document Status Document Status Document Status Product Preview Preliminary Datasheet Datasheet Datasheet (discontinued) Page 30 Document Feedback Product Status Definition Pre-Development Information in this datasheet is based on product ideas in the planning phase of development. All specifications are design goals without any warranty and are subject to change without notice Pre-Production Information in this datasheet is based on products in the design, validation or qualification phase of development. The performance and parameters shown in this document are preliminary without any warranty and are subject to change without notice Production Information in this datasheet is based on products in ramp-up to full production or full production which conform to specifications in accordance with the terms of ams AG standard warranty as given in the General Terms of Trade Discontinued Information in this datasheet is based on products which conform to specifications in accordance with the terms of ams AG standard warranty as given in the General Terms of Trade, but these products have been superseded and should not be used for new designs ams Datasheet [v2-07] 2016-Jan-21 AS3691 − Revision Information Revision Information Changes from 2.3 (2007-Oct-30) to current revision 2-07 (2016-Jan-21) Page 2.3 (2007-Oct-30) to 2-04 (2015-Dec-18) Content of austriamicrosystems datasheet was converted to latest ams design Added benefits to Figure 1 1 Updated Figure Absolute Maximum Ratings 7 Updated Ordering & Contact Information 29 2-04 (2015-Dec-18) to 2-05 (2015-Dec-22) Updated QFN Package section 23 Updated eP-TSSOP Package section 25 2-05 (2015-Dec-22) to 2-06 (2016-Jan-18) Updated Ordering & Contact Information 27 2-06 (2016-Jan-18) to 2-07 (2016-Jan-21) Updated Figure 1 1 Note(s): 1. Page and figure numbers for the previous version may differ from page and figure numbers in the current revision. 2. Correction of typographical errors is not explicitly mentioned. ams Datasheet [v2-07] 2016-Jan-21 Page 31 Document Feedback AS3691 − Content Guide Content Guide Page 32 Document Feedback 1 1 2 2 General Description Key Benefits & Features Applications Application Diagrams 4 4 Pin Assignments Pin Descriptions 7 8 10 Absolute Maximum Ratings Electrical Characteristics Typical Operating Characteristics 15 15 15 16 Detailed Functional Description Shunt Regulator Overtemperature Protection Automatic Supply Regulation 18 18 20 21 22 Application Information Typical Application Schematic Design Example Using Automatic Supply Regulation Layout Recommendations 23 23 25 Package Drawings & Markings QFN Package ePTSSOP Package 27 28 29 30 31 Ordering & Contact Information RoHS Compliant & ams Green Statement Copyrights & Disclaimer Document Status Revision Information ams Datasheet [v2-07] 2016-Jan-21