BD9740KN-E2 Rohm Semiconductor, BD9740KN-E2 Datasheet

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BD9740KN-E2

Manufacturer Part Number
BD9740KN-E2
Description
IC SWITCH REG W/FET 48UQFN
Manufacturer
Rohm Semiconductor
Series
-r
Type
Step-Down (Buck), Step-Up (Boost), Inverting, PWMr
Datasheet

Specifications of BD9740KN-E2

Internal Switch(s)
Yes
Synchronous Rectifier
Yes
Number Of Outputs
7
Voltage - Output
-
Current - Output
30mA
Frequency - Switching
100kHz ~ 1.2MHz
Voltage - Input
1.5 V ~ 10 V
Operating Temperature
-20°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
48-VFQFN
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Regulators ICs for Digital Cameras and Camcorders
System Switching Regulator ICs
with Built-in FET (10V)
●Description
●Features
●Applications
●Product lineup
© 2010 ROHM Co., Ltd. All rights reserved.
www.rohm.com
BD9739KN, BD9740KN
The 7-channel switching regulators include built-in FETs, and are designed for use in digital still cameras.
They feature built-in power FETs and soft start functionality, reducing the number of external components.
Digital still cameras, portable DVD players, and digital video cameras.
10) Support a constant-current LED drive for backlight applications
Input voltage
Reference voltage precision
Operating frequency range
Step-up
Step-down
Step-up/step-down switch regulator
Inverting
Built-in FET
Synchronous rectification
Load switching
Operating temperature range
Package
11) Includes multiple synchronous rectification channels
1) Wide supply voltage range: 1.5 V to 10 V
2) High-precision reference voltage: ± 1%
3) Built-in shutdown circuit for overload (timer-latch type)
4) Oscillator frequency is user-adjustable
5) Built-in thermal shutdown circuit
6) Standby mode current: 0 μA
7) Built-in load switch circuit
8) Selectable step-up/step-down mode
9) Supports inverting circuit for negative output voltage
Parameter
100 k to 1.2 MHz
-20℃ to +85℃
1.5 V to 10 V
BD9739KN
1 V ± 1%
UQFN64
3CH
2CH
1CH
1CH
3CH
3CH
3CH
1/14
100 k to 1.2 MHz
-20℃ to +85℃
1.5 V to 10 V
BD9740KN
1 V ± 1%
UQFN48
2CH
1CH
3CH
1CH
1CH
2CH
2010.09 - Rev.A
No.10036EAT07

Related parts for BD9740KN-E2

BD9740KN-E2 Summary of contents

Page 1

... Regulators ICs for Digital Cameras and Camcorders System Switching Regulator ICs with Built-in FET (10V) BD9739KN, BD9740KN ●Description The 7-channel switching regulators include built-in FETs, and are designed for use in digital still cameras. They feature built-in power FETs and soft start functionality, reducing the number of external components. ...

Page 2

... V -0.3 to +15 V -0.3 to +12 V -0.3 to +20 V ― V ― V ― V UQFN48 *1-3 500 mW *2-2 *2-3 760 -25~+85 ℃ -55~+125 ℃ +125 ℃ Ratings Unit BD9740KN Unit Conditions MHz External FET drive circuit mA External FET drive circuit (BD9739KN 2010.09 - Rev.A ...

Page 3

... FB = 1.7 V, VINV = 1.1 V µ 1.7 V, VINV = 0.9 V kΩ (BD9740KN) kΩ (BD9740KN duty V 100% duty % VINV = 0.9 V, VSCP = 0 V VINV = 0 VSCP, UDSEL = -30 mA PVCCH = 5 V(IO = 200 mA) mΩ (BD9740KN) PVCCL = 5 V(IO = 200 mA) mΩ (BD9740KN) PVCCL = 5 V( mA) Ω 2010.09 - Rev.A ...

Page 4

... The driver block's power source is supplied to the PVCCL pin for the low-side and the PVCCH pin for the high-side. (For the BD9740KN, both sides are supplied to the PVCCH pin.) In order to turn the FET on, a potential of at least 4 V must be supplied to the PVCCL pin, and a potential of at least, DRAINH pin voltage + 4 V, must be supplied to the PVCCH pin ...

Page 5

... BD9739KN,BD9740KN ●Block diagram and application circuit (BD9739KN) Connect a capacitor to prevent oscillation to the VREF pin. (See page 7.) Connect a capacitor for setting the soft start time. (See pages 8& 9.) Connect a capacitor for soft start at DTC pin. (See page 8.) Connect a resistor for setting the output voltage. ...

Page 6

... BD9739KN,BD9740KN ●Block diagram and application circuit (2) BD9740KN Connect a capacitor to prevent oscillation to the VREF pin. (See page 7.) Connect a capacitor for setting the soft start time. (See page 8&9.) The soft start times for CH2 to CH4 are fixed internally. (See page 9.) Connect a capacitor for soft start at TC pin ...

Page 7

... Pin No. Pin name 61 VBAT 29 VCC 54 PVCC 14 PVCCH 59 PVCCL 8,9,57 PGND23,PGND 42 GND 30 VREGA 51,52,53 OUT4,5,6 58 OUT7B ●BD9740KN Pin No. Pin No. Pin name 4 VBAT 21 VCC 46 PVCC 10 PVCCH 42 PGND 6,7 PGND4 31 GND 22 VREGA 40,41,45,47,48 OUT1,3,5,6,7 ●Block diagram explanation and setting peripheral IC components 1. Voltage reference (VREF) VREF is the reference voltage source of 1.0V output voltage. Connect a capacitor to prevent oscillation. Set the capacitance from 1.0 μ ...

Page 8

... BD9739KN,BD9740KN 6. Setting the oscillating frequency The oscillating frequency can be set by connecting the resistance value to the RT pin and connecting the capacitance value to the CT pin. Oscillating frequency = VRT / (CT  RT) (Unit: Hz) *Set the resistance value, connected to the RT pin, from 4.7 k k *Set the capacitance value, connected to the CT pin, from 100 pF to 10,000 pF. ...

Page 9

... Startup will begin when this voltage reaches the minimum voltage of the CT pin's triangular waveform. *Set the capacitance connected to each DTC pin to 10 μF or less. 12. Internal soft start operation Soft start times are set internally for CH4, CH6, and CH7 (BD9739KN); and CH2 to CH4 (BD9740KN). BD9739KN CH4 2.7 ms BD9740KN CH2 to CH4: 3 ...

Page 10

... BD9739KN,BD9740KN ●I/O Equivalent circuit diagrams DTC5 to DTC7 (dead time control) VREGA Vcc DTC5 Vcc DTC6 DTC7 SS1 (startup channel soft start capacitor connection pin) Vcc VBAT Vcc SS1 CT (triangular waveform timing capacitance connection) VREGA Vcc CT VREF (reference voltage output) Vcc Vcc ...

Page 11

... BD9739KN,BD9740KN STBY1 to STBY7 (CH1 to CH7 on/off control) REGON (CCD REG control input) MODE (CCD sequence control pin) STBY1 to STBY7 REGON MODE SWIN (load switch input pin) SWOUT (load switch output pin) SWIN4 SWOUT4 PG1IN (POWERGOOD 1 input) PG1OUT (POWERGOOD switch 1 output) PG1OUT ...

Page 12

... BD9739KN,BD9740KN ●Notes for use 1) Absolute maximum ratings An excess in the absolute maximum ratings, such as supply voltage, temperature range of operating conditions, etc., can break down the devices, thus making impossible to identify breaking mode, such as a short circuit or an open circuit. If any over rated values will expect to exceed the absolute maximum ratings, consider adding circuit protection devices, such as fuses ...

Page 13

... BD9739KN,BD9740KN 13) Ground wiring patterns The power supply and ground lines must be as short and thick as possible to reduce line impedance. Fluctuating voltage on the power ground line may damage the device. 14) STB pin voltage Set the STB pin voltage to 0 lower when setting channels to a standby state 2 higher when setting channels to an operational state ...

Page 14

... BD9739KN,BD9740KN ●Ordering part number Part No. Part No. 9739 9740 UQFN64 8.2±0.1 8.0±0.1 (1. 0.2±0.05 0.05 M 0.05 +0.1 0.6 -0.3 Notice : Do not use the dotted line area for soldering 0.4 UQFN48 7.2 ± 0.1 7.0 ± 0.1 (1. 0.2 ± 0.05 0. ...

Page 15

No copying or reproduction of this document, in part or in whole, is permitted without the consent of ROHM Co.,Ltd. The content specified herein is subject to change for improvement without notice. The content specified herein is for the purpose ...

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