AAT1118 AAT | Alldatasheet

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Technical content

Features

Built in 1.6A, 0.2 Switching NMOS Fault and Thermal Protection Internal Soft-Start Function Internal Power Up Sequencing Dual Adjustable Charge Pump Output Positive Output to 40V Negative Output to 40V- Power Good Output Pin Configuration (Top View) General Description The AAT1118/A/B is an adjustable triple-channel TFT LCD DC-DC converter that provides one current mode PWM, one positive charge pump and one negative charge pump. Built-in functions include soft-start and power up sequencing. When power is turned on, soft-start avoids inrush current. Power up sequencing feature provides compensation for LCD panel to maintain a smooth voltage during a turn-on cycle. The DC-DC converter consists of an on-chip voltage reference, error amplifier, current sense, pulse width modulation controller, under-voltage lockout protection, thermal detect, soft-start, and fault protection circuit. When the two charge pumps are in operation, the output voltage would be doubled and the generated VP3 and VP2 (Note 1) could switch on or off TFT gate. With the minimal external components, the AAT1118/A/B offers a simple and economical solution for TFT LCD power. Note 1: Please refer to page 13 and 14 for VP3 and VP2. (TSSOP-16 Package) AAT1118/A/B 8 9 PGO IN1 EO GND IN3 IN2 GND1 SW GND2 OUT3 OUT2 SHDN DDV DD1VREFV DD2V CH3V AAT1118/A/B 8 9 PGO IN1 EO GND IN3 IN2 GND1 SW GND2 OUT3 OUT2 SHDN DDV DD1VREFV DD2V CH3V

~ H]¶ ߆ø – Page 2 of 18 V 1.0 AAT1118/A/B Pin Description PIN NO. NAME I/O DESCRIPTION

1 PGO O HV Switch Output

2 IN1 I Inverting Input Pin of PWM Error Amplifier

3 EO I Output Pin of PWM Error Amplifier

4 DDV - Power Supply

5 GND - Ground

6 REFV O Reference Voltage Output

7 IN3 I Charge Pump Channel 3 Feedback Input

8 IN2 I Charge Pump Channel 2 Feedback Input

9 SHDN I Shutdown Control Pin; High for Enable

10 OUT2 O Charge Pump Channel 2 Output

11 DD1V - High Voltage Power Supply

12 OUT3 O Charge Pump Channel 3 Output

DD2V - High Voltage Power Supply 13 CH3V O Power Output for Channel 3 (AAT1118B Only)

14 GND2 - Ground

15 SW O Switch Pin

16 GND1 - SW MOS Ground

~ H]¶ ߆ø – Page 3 of 18 V 1.0 AAT1118/A/B Absolute Maximum Ratings PARAMETER SYMBOL VALUE UNIT DDV to GND DDV 7 V SW to GND SWV 18 V DD1V , DD2V to GND DDHV 16 V Input Voltage 1 (IN1, IN2, IN3, SHDN) V I1 DDV +0.3 V Output Voltage 1 (EO, REFV ) O1V DDV +0.3 V Output Voltage 2 (OUT2, OUT3, SW, PGO) O2V DDHV +0.3 V Operating Free-Air Temperature Range CT 40- to 85+ C Storage Temperature Range storageT 45- to 125+ C Power Dissipation dP 750 mW

~ H]¶ ߆ø – Page 4 of 18 V 1.0 AAT1118/A/B Electrical Characteristics, VDD= 3.3V, VDDH= 10V Operating Power PARAMETER SYMBOL TEST CONDITION MIN TYP MAX UNIT Input Supply Voltage Range DDV 2.6 5.5 V Regulated Output Voltage Range P1V 6 14 V IN1V =1.3V, not switching 0.5 0.8 mA Quiescent Current VDDI IN1V =1.1V, switching 3 6 mA Shutdown Current SHDNI SHDNV =GND 0.1 10.0 A Thermal Shutdown 160 C Reference Voltage PARAMETER SYMBOL TEST CONDITION MIN TYP MAX UNIT Reference Voltage REFV IVref = 100µA 1.238 1.250 1.262 V Line Regulation RIV IVref = 100µA, DDV =2.5V~5V - 2 5 mV Load Regulation ROV IVref = 0~100µA - 1 5 mV EA (Error Amplifier) PARAMETER SYMBOL TEST CONDITION MIN TYP MAX UNIT Feedback Voltage IN1V ßł łÿ‡‡÷öł‡ Input Bias Current 1BI VIN1=1.24V 0 40 nA Feedback-Voltage Line Regulation RIV 0.05 0.15 % /V Transconductance mg ÔI=5A 70 105 240 A /V Voltage Gain VA ‡ 1,500 V /V Fault Detect Trigger Voltage FIV ‡ 1.07 1.10 1.14 V

~ H]¶ ߆ø – Page 5 of 18 V 1.0 AAT1118/A/B Electrical Characteristics, VDD= 3.3V, VDDH= 10V Oscillator PARAMETER SYMBOL TEST CONDITION MIN TYP MAX UNIT Oscillation Frequency OSCf 1,100 1,320 1,600 kHz Maximum Duty Cycle MAXD 79 85 92 % N-Channel Switch PARAMETER SYMBOL TEST CONDITION MIN TYP MAX UNIT Current Limit LIMI 1.1 1.6 2.1 A On-Resistance ONR SWI =1.2A 0.28 0.50 Ł Leakage Current SWOFFI SWV =12V 0.01 20.00 A Control Inputs Characteristics PARAMETER SYMBOL TEST CONDITION MIN TYP MAX UNIT Input Low Voltage ILV 0.3 DDV V Input High Voltage IHV 0.7 DDV V Hysteresis HYSV 0.1 DDV V SHDN Pull Up Current PHI ‡ 0.001 1.000 A

~ H]¶ ߆ø – Page 6 of 18 V 1.0 AAT1118/A/B Electrical Characteristics, VDD= 3.3V, VDDH= 10V Soft Start & Fault Detect Time PARAMETER SYMBOL TEST CONDITION MIN TYP MAX UNIT Channel 1 Soft Start Time SS1t 14 ms Channel 2 Soft Start Time SS2t 3.5 ms Channel 3 Soft Start Time SS3t 3.5 ms Channel 1 to Channel 2 Delay D12t AAT1118A 7 ms Channel 2 to Channel 3 Delay D23t AAT1118B 10.5 ms During Fault Protect Trigger Time FPt ‡ 83 ms IN1 Fault Protection Voltage F1V ‡ 1.05 1.10 1.15 V IN2 Fault Protection Voltage F2V ‡ 0.08 0.13 0.18 V IN3 Fault Protection Voltage F3V 1.05 1.10 1.15 V ‡

~ H]¶ ߆ø – Page 7 of 18 V 1.0 AAT1118/A/B Electrical Characteristics, VDD= 3.3V, VDDH= 10V Charge Pump Regulator Characteristics PARAMETER SYMBOL TEST CONDITION MIN TYP MAX UNIT DD1V Input Supply Range DD1V 6 15 V DD2V Input Supply Range DD2V 6 15 V IN2 Threshold Voltage IN2 50- 0 50 mV IN3 Threshold Voltage IN3 1.20 1.25 1.30 V IN2 Input Bias Current B2I VIN2= 0.05V- 50- 50 nA IN3 Input Bias Current B3I V IN3= 1.5V- ‡ 50- 50 nA Charge Pump Frequency OSCPf ‡ 540 640 740 kHz ONP2R ‡ 3 20 Ł OUT2 Switch R-on ONN2R ‡ 3 20 Ł‡ ONP3R ‡ 3 20 Ł OUT3 Switch R-on ONN3R ‡ 3 20 Ł‡ Continuous Output Current OUTI 30 Ô‡

~ H]¶ ߆ø – Page 8 of 18 V 1.0 AAT1118/A/B BLOCK DIAGRAM AAT1118/A Bandgap & Soft Start 1.24v Slope Compensation Current sense Control Logic Driver Oscillator Comparator Error Amplifier Clock EO IN1 GND1 SW SHDNSHDN Thermal SHDN Power Up Sequence Fault Detect IN1 OSC OSC OSC 1.24v EN1 EN2 EN3 PGO OUT3 IN3 IN2 OUT2 GND GND2 GND2 REFV DDV DD1VDD2V Bandgap & Soft Start 1.24v Slope Compensation Current sense Control Logic Driver Oscillator Comparator Error Amplifier Clock EO IN1 GND1 SW SHDNSHDN Thermal SHDN Power Up Sequence Fault Detect IN1 OSC OSC OSC 1.24v EN1 EN2 EN3 PGO OUT3 IN3 IN2 OUT2 GND GND2 GND2 REFV DDV DD1VDD2V

~ H]¶ ߆ø – Page 9 of 18 V 1.0 AAT1118/A/B BLOCK DIAGRAM AAT1118B Bandgap & Soft Start 1.24v Slope Compensation Current sense Control Logic Driver Oscillator Comparator Error Amplifier Clock EO IN1 GND1 SW SHDNSHDN Thermal SHDN Power Up Sequence Fault Detect IN1 OSC OSC OSC 1.24v EN1 EN2 EN3 PGO OUT3 IN3 IN2 OUT2 GND GND2 GND2 REFV DDV DD1VDD2V Bandgap & Soft Start 1.24v Slope Compensation Current sense Control Logic Driver Oscillator Comparator Error Amplifier Clock EO IN1 GND1 SW SHDNSHDN Thermal SHDN Power Up Sequence Fault Detect IN1 OSC OSC OSC 1.24v EN1 EN2 EN3 PGO OUT3 IN3 IN2 OUT2 GND GND2 GND2 REFV DDV DD1VDD2V

~ H]¶ ߆ø – Page 10 of 18 V 1.0 AAT1118/A/B Typical Operating Characteristics (VIN = 3.3V, CT = +25°C, unless otherwise noted.) 9.84 9.86 9.88 9.9 9.92 9.94 9.96 9.98 10.02 10.04 0 100 200 300 400 500 600 700 800 100 0 100 200 300 400 500 100 0 100 200 300 400 500 0 50 100 150 200 250 300 350 0 5 10 15 20 25 30 35 40 -6.05 -5.95 -5.9 -5.85 -5.8 0 5 10 15 20 25 30 35 40

~ H]¶ ߆ø – Page 11 of 18 V 1.0 AAT1118/A/B Typical Operating Characteristics (Continued) (VIN = 3.3V, CT = +25°C, unless otherwise noted.) 17.7 17.75 17.8 17.85 17.9 17.95 18.05 0 2 4 6 8 10 12 14 16 18 20 0 2 4 6 8 10 12 14 16 18 20 0.85 0.9 0.95 1.05 1.1 1.15 1.2 2.5 3 3.5 4 4.5 5 5.5

~ H]¶ ߆ø – Page 12 of 18 V 1.0 AAT1118/A/B Typical Operating Characteristics (Continued) (VIN = 3.3V, CT = +25°C, unless otherwise noted.)

~ H]¶ ߆ø – Page 13 of 18 V 1.0 AAT1118/A/B Application Circuit AAT1118/A SW IN1 EO PGO IN2 GND VP1 VP1 VP2 VP2 AAT1118/A VP3 VP3 OUT3 IN3 SHDNSHDN GND2 OUT2 GND1 VP1 REFV DDV DD1V DD2V

~ H]¶ ߆ø – Page 14 of 18 V 1.0 AAT1118/A/B Application Circuit AAT1118B SW IN1 EO PGO IN2 GND VP1 VP1 VP2 VP2 AAT1118B VP3 VP3 OUT3 IN3 SHDNSHDN GND2 OUT2 GND1 VP1DD1V CH3V REFV DDV !!!! !!!! !!!! !!!! !!!! !!!! !!!!

~ H]¶ ߆ø – Page 15 of 18 V 1.0 AAT1118/A/B Timing Chart AAT1118 V DD SHDN V P1 V P2 V P3 - 8V 25V 90% 14ms Max. PGO V DD SHDN V P1 V P2 V P3 - 8V 25V 90% 3.5ms 3.5ms Max. PGO

~ H]¶ ߆ø – Page 16 of 18 V 1.0 AAT1118/A/B Timing Chart AAT1118A V DD SHDN V P1 V P2 V P3 - 8V 25V 14ms 3.5ms 7ms 3.5ms Max PGO V DD SHDN V P1 V P2 V P3 - 8V 25V Max PGO

~ H]¶ ߆ø – Page 17 of 18 V 1.0 AAT1118/A/B Timing Chart AAT1118B !!!! !!!! !!!! !!!! !!!! !!!! !!!! !!!! !!!! !!!! !!!! !!!! !!!! !!!! !!!! !!!! !!!! VDD SHDN VP1 V P2 V P3 - 8V 25V 14ms 3.5ms 10.5ms 3.5ms 90% Max PGO VDD SHDN VP1 V P2 V P3 - 8V 25V 90% Max PGO

~ H]¶ ߆ø – Page 18 of 18 V 1.0 AAT1118/A/B Package Dimension 16-Pin TSSOP !!!! !!!! !!!! !!!! ıÿ‡ àü‡ ç쪇 àô ‡ àü‡ ç쪇 àô