L9909

L9909 STMICROELECTRONICS | Alldatasheet

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Oscillator. The output current at ROSC pin is mirrored to COSC pin with a proper direction according to its voltage slope. The triangular wave form at COSC pin, being compared with a threshold, defines the PWM duty cycle at the motor driver output M+ and M-. The oscillator also supplies the time base for the switch off and switch on delays and the Time Out Counter. The typical oscillator period is: Tosc = 7.04 x Rosc x Cosc February 2001 150K Ω 150KΩ OP1 COMP1 + - 0 1 375KΩ 1 2 VR3 =6.6% Vcc COMP7 switch on DELAY VR7 = 7.5% Vcc switch off DELAY 35V 35V VR3 = 6.6% Vcc VR2 = 56.6% Vcc COMP2 COMP3 I I curr. sense I OSCILLATOR OP8 VR8 = 14.2% Vcc COMP4 pwm DELAY VR4 = 1.5V COUNTER Tck RES TIME OUT Vcc Tck FF S R Tck Tck Vcc Tck Vcc ROSC GND VR2 =56.6%Vcc VR3=6.6%Vcc TEMP. SENSE Current ratio = 1 : 2 VR5 = 6.6% Vcc | 5 Verr| curr. limit curr. limit Vcc Vcc Vcc 16V VR2 = 56.6% Vcc VR3 = 6.6% Vcc Td_on Td_pwm Td_off 10V open over temp. VOLT. SENSE over volt. over volt. DELAY 1 Td_ov_1 (130µs) Vcc open START LATCHLatch IN STOP STOP START DIRECTION PWM DRIVE R CONTROL OFF OFF over volt. DELAY2 Td_ov_2 (1ms) Q curr. limit curr. limit BLOCK DIAGRAM MInidip ORDERING NUMBER: L9909 L9909 DC MOTOR DRIVER WITH POSITION CONTROL

Symbol Parameter Value Unit VCC DC battery supply voltage -0.3 to 55 V VCC_t Transient battery supply voltage (Figs. 4 and 5) -0.3 to VCC_CL (*) V Vin Voltage at VCOM and VFB pins -0.3 to V CC +0.3 V VROSC Voltage AT ROSC pin -0.3 to 7 V VCOSC Voltage at COSC pin for VCC >16V -0.3 to16 V Voltage at COSC pin for V CC >16V -0.3 to V CC +0.3 V ICC Current at VCC GND, M+ and M- ±1.9 A ICC_t Transient Current at VCC GND (figs. 4 and 5) ±4A Isig Current at VFB, VCOM, COSC and ROSC ±10 mA Pd Device Power Dissipation internally limited W Tj Junction Temperature -40 to 150 °C Tstg Storage and Junction Temperature -55 to 150 °C VESD ESD Voltage Level (Human body Model - MIL STD883C) ±2000 V (*) NOTE: SELF PROTECTING Stressed above those listed under”Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress rating anly and functional operation of the device at any condition above those indicated in the operational section of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. THERMAL DATA Symbol Parameter Value Unit R th j-case Thermal resistance Junction to case (pin 1) 70 °C/W GND COSC VFB VCOM 4M - VCC ROSC M+8 D99AT436 PIN CONNECTION L9909

ELECTRICAL CHARACTERISTICS (VCC = 7 to 18V; Tj= -40 to 85°C, unless otherwise specified.) Pin Symbol Parameter Test Condition Min. Typ. Max. Unit POWER SUPPLY VCC I CC Quiescent Supply Current I M+ =IM- =0 ,IROSC = 100µA; VCOSC =0 10 mA VCC_OV Over Voltage Shut Down 18 20 V VCC_OVdel Over Voltage Shut Down Delay 130 µs VCC_min Minimum VCC Operating Voltage - Other Parameter may not be in spec 5.5 V VCC_CL Battery Supply Clamp Voltage Transients of Fig.5 70 80 V Td_ov_1 Battery Supply Clamp Time Transients of Fig.5 130 1000 µs Td_ov_2 Battery Supply Clamp Time Transients of Fig.4 1 ms OSCILLATOR COSC ROSC R OSC Oscillator Resistor 10 100 K Ω C OSC Oscillator Capacitor 2 100 nF TOUT Timer Run Time 16384 T OSC FOSC Oscillator Frequency ROSC 27K Ω ;C OSC = 10nF 430 530 630 Hz ROSC V rosc Voltage at ROSC pin R OSC 27KΩ 14.2 %V CC COSC I COSC Current at COSC pin R OSC 27KΩ -20 I ROSC 20 % VTHCOSC High Threshold Voltage 56.6 1000 %V CC VTLCOSC Low Threshold Voltage 6.6 1000 %V CC VLINERR Voltage Ramp Linearity Error -20 20 % PIN FUNCTIONS N. Name Function

1 GND Ground

2 COSC Oscillator Capacitor

3 VFB Position Feedback Voltage

4 VCOM Position Command Voltage

5 M- Negative Motor Terminal

6 VCC Power Supply

7 ROSC Oscillator Resistor

8 M+ Positive Motor Terminal

ELECTRICAL CHARACTERISTICS (continued.) Pin Symbol Parameter Test Condition Min. Typ. Max. Unit INPUT OUTPUT TRANSER FUNCTION VCOM VFB COSC A V Input Output Gain 7 10 14 VSTP Stop Motor Voltage V STP =2V R4 2.5 3 3.5 V VSTR Start Error Voltage V STR =V R7/5 1 1.5 2 %V CC Voff_c1 Comp 1 Input Offset Voltage Error Voltage when the motor starts braking -20 20 mV Ton Switch on Delay 1 2 T OSC Toff Switch off Delay 1 2 T OSC VCOM VFB R diff Differential Input Impedance (see fig 3) 2VCOM − VFB Icom − IFB 100 300 K Ω R com Common Mode Input (see fig 3)VCOM + VFB Icom + IFB

50 K Ω

R ON_H High Side RDS IM+ =IM- = 0.3A; VCC =13.5V 0.6 1.5 Ω IM+ =IM- = 0.3A; VCC =7V 1 2.6 Ω R ON_L Low Side RDS I M+ =IM- = 0.3A; VCC =13.5V 0.6 1.5 Ω IM+ =IM- = 0.3A; VCC =7V 1 2.6 Ω ILIM Output Current Limit for each of 4 Output Transistors Separately 1 1.9 A T R Output Rise Time 20% to 80% 20 µs TF Output Fall Time 80% to20% 20 µs VMTRAN |V(M+) - V(M-)| Output Voltage During VCC Transients Transients of figs.4 and 5 20 V THSHDN Thermal Shutdown 170 °C VOUT Vcc Vcc ΔV OUT ΔVerr =10 -Vcc -Vcc V STR = 1.5% Vcc VSTP Vcc-VSTP

10 Verr

-VSTP V STR = -1.5% VccVcc-VSTP Figure 1.Static Transfer Characteristic. Error Voltage vs. Output Voltage VOUT Vcc 100 ΔVOUT ΔVerr =10 -100 -Vcc 1.5 Perr [%] -VSTP -1.5 VSTP Vcc Vcc Figure 2.Static Transfer Characteristic. Position Error Voltage vs. Output Voltage Perr = Verr/V CC L9909

The following is the discriminating algorithm be- tween fast and slow Vcc transients. The transient voltage clamp is normally set at 70V. If Vcc rises above the Vcc_ov=19V typ. over voltage shut- down threshold, both Td_ov_1 and Td_ov_2 tim- ers start. When the first timer stops (after 130µs typ. delay) the clamp status is evaluated and locked. If the transient has been fast enough and the voltage clamp activated, then it remains 70V active until the second timer stops (after 1ms de- lay), then it deactivates by rising to 80V. If the transient has been slow and the voltage clamp unreached when the first timer stops, then it de- activates by rising to 80V. A new 70V clamp cycle may restart only by lowering Vcc below the 19V over voltage shutdown threshold. The VFB and VCOM input pins may connect to the Vcc or lower voltage during the power supply transients of Figs. 4 and 5. L9909

DIM. mm inch A 3.32 0.131 a1 0.51 0.020 B 1.15 1.65 0.045 0.065 b 0.356 0.55 0.014 0.022 b1 0.204 0.304 0.008 0.012 D 10.92 0.430 E 7.95 9.75 0.313 0.384 e 2.54 0.100 e3 7.62 0.300 e4 7.62 0.300 F 6.6 0.260 I 5.08 0.200 L 3.18 3.81 0.125 0.150 Z 1.52 0.060 Minidip L9909

Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specification mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics. The ST logo is a registered trademark of STMicroelectronics  2001 STMicroelectronics – Printed in Italy – All Rights Reserved STMicroelectronics GROUP OF COMPANIES Australia - Brazil - China - Finland - France - Germany - Hong Kong - India - Italy - Japan - Malaysia - Malta - Morocco - Singapore - Spain - Sweden - Switzerland - United Kingdom - U.S.A. http://www.st.com L9909