HT4906

Ver1.0 1

HT4906

LED

IC+MCU+ IC

IPADMID

MP3MP4

4

MOSFET

0V //

MOSFET

4KV ESD

USB_IN

500KHZ

5uA

20uA

LED

BTP

HT4906

2

1

2

3

4

5

6

7

8 9

10

11

12

13

14

15

16LED

EXT_CH

L1

L2

L3

L4

KEY

CE GND

STB

FB

TS

EXT

LX

BTP

VDD

1 LED

2 EXT_CH

3 L1 1

4 L2 2

5 L3 3

6 L4 4

7 KEY

8 CE 9 GND

10 STB

11 FB

12 TS 13 EXT BOOST

14 LX BOOST

15 BTP

16 VDD 5V

HT4906

3

D1

C1

10uF

LED

EXT_CH

L1

L2

L3

L4

KEY

CE

VDD

BTP

LX

EXT

TS

FB

STB

GND

LED1

LED2

LED3

LED4

1

2

3

4

VCC

D-

D+

GND

3

2

1

B-

B+VSS

VDD

TD

OD

CSI

OC

6

5

4

1

2G2

S2

S2

D2

G1

S1

S1

D11

2

3

45

6

7

8

1

2

3

4

VCC

D-

D+

GND

Q1

8550

R1

1K

U1

HT4906

R11

100R

C7

0.1uF

U2

DW01+R12

1K

HT8205A

LED5 K1 Q4

HT9926

C2

1UF

C3

1UF

C4

10UF

L1

4.7uFD2

Q3

HT9926C5

100UFC6

10UF

R2

261K

R3

82K

R7

43K

R8

75K

R9

51K

R10

51KR4A R4B

USB_OUT

USB_IN

D1

S1

S1

G1

D2

S2

S2

G25

6

7

81

2

3

4

HT8205A

Q5

3904

R6

100K

R5

1K

0.1R 0.1R

(symbol) parameter unit VDD 2~6 V BTP 2~6 V

TJ 150 TSTG / -40~125 10sec 260

(symbol) parameter value unit VCC VCC 2~6 V TA -20~85

HT4906

4

GND 0

GND 0

Min Typ Max

VIN V 2 5 6

ICC VIN =5V VIN =0V VIN =0V

mA mA uA

0.7 0.6 5

ILED L1~L4 L1~L4

1V mA 3

ILED2 LED mA 30

VIN

VIN Vin>BAT mV 250

VIN Vin>BAT mV 50

VBAT V 4.15 4.20 4.25

VCV CV V 4.20

I_EXT_DN mA 50

T_SS_EXT mS 128

mS 128

ICONST mA 500

ITRKL mA 100

IFULL mA 100

TFULL S 8

VTRKL VBAT V 2.8

VRECHG VBAT V 4.1

TTAP mS 50

S 3

FLED LED Hz

THOLD S

TC_LED S 16

VSD VBAT V 3.2

VSD1 V 3.0

HT4906

5

Min Typ Max

VBSTFB V 1.225 1.25 1.275

UVLO V 3.2

INOLOADOFF mA 20 50 100

TNOLOADOFF S 30

Dmax % 78 90 95

TN_DRIVE NGATE (load=1nF) nS 10

nS 8.5

F KHz 400 500 600

OTP degC 150

degC 20

Vocp BTP=3.2V V 0.26 0.30 0.34

BTP=4.2V V 0.18 0.20 0.22

Tss mS 2

NOTE: 3.2V 3.2V

3V

HT4906

6

L1

BTP

LED

CE

BTP

KEY

VDD

BTP

LX

EXT

EA

1.25V

FB

Boost

STB

Gnd

L2

L3

L4

EXT_CH

HT4906

7

1

2 MOSFET 500mA

3 2.8V

4 0V

5:

6 5A ;

7

LED

1 LED

2 LED

3LED 4

4Boost BAT=3.2V , ;

5 16S

512mS

6

L1 L2 L3 L4

BAT

HT4906

8

L1-L4

L1

L2

L3

L4

5T

T

T

Vbat

HT4906

9

3.7

HT4906

10

0.5s

50mskey_one=1

0.5s

50ms

key_two=1

3

1

2

HT4906

11

SOP16